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I am seeking a talented mobile app developer to create a comprehensive referral earning app that enables teachers, tutors, and parents to connect. The scope of learning levels ranges from kindergarten to university, crossing all subjects. This app will be used for scheduling a minimum of four sessions a month. Key Features: - User registration and login: Users should register and log in via email and password. An extra level of security will be phone number verification. - Search and browse tutors: A user-friendly interface for finding tutors is needed. - Filters: Tutors should be sorted based on subject and level of expertise. - Messaging: A secure communication system between parents and tutors is essential. Ideal Skills: - Proven experience in developing education-related apps...

...Features: - Implementing job posting and browsing functionalities where users can post and explore various job opportunities. - Developing intricate user profiles and a rating system to enhance credibility and ensure quality service. - Creating an advanced search and filtering system to help users find suitable jobs quickly and efficiently. User Authentication: - The app must support numerous login options including email/password, social media, and single sign-on with existing platforms for user convenience. Notifications: - The app should be capable of sending job alerts, new message notifications, and profile update alerts. Candidates with experience in building job board apps or similar platforms will be preferred. Understanding of user authentication methods and notificat...

I am in need of a proficient web developer to construct a user-friendly, SEO-optimized marketplace website for holiday bookings. Inspired by platforms like traveltriangle and tripfactory, this platform will be built in NextJS and Bootstrap. Key Features: - User Registration and Login - Search and Filter Functionality - Please follow reference website Services on Offer: - The website focuses on Holiday Packages and potential clients can post leads. Booking Process: - For the booking system, we'd like to implement enquiry-based bookings, making it easy for users to inquire about their respective holiday packages before making a booking. Candidates with prior experience in creating marketplace websites, fluency in NextJS and Bootstrap, and an understanding of SEO principles ar...

...features should include: 1. Real-Time Sales Tracking: The web needs to provide real-time sales statistics. This means I should be able to monitor sales as they happen, giving me unparalleled insight into my company's performance. 2. Multi-Level User Access: The web should have a Hierarchical user structure, meaning different sets of information for different users roles. Also, individual user login should be implemented to ensure security and data integrity. 3. Sales Reports and Analytics: The web must be capable of generating comprehensive sales reports. Moreover, it should be equipped with analytics functionalities to gain actionable insight from the sales data. 4. Inventory and Customer Tracking: The web needs to track not only sales but also the inventory to ensure c...

Develop a MERN project with the following requirements, 1. Multiple login based on roles 2. Form Submission 3. Custom URL creation

I am seeking an experienced developer proficient in Python, Django, and React to guide our junior developers. In this role, you will be tasked with: - Providing assistance with handling tokens and CSRF - Assisting in debugging our code The end goal for the project is to build a robust web application that consists of two key functionalities: - User registration and login - Social media integration In order to succeed in this role, you should have a strong background in Python, Django, and React. Relevant experience in diagnosing and debugging code, along with CSRF token handling, is a must. A keen eye for problem-solving, excellent communication, and mentorship skills will also be beneficial.

I'm urgently in need of a talented web designer to customize an HTML template following a specific Figma design that I'll provide. The template should also align with a specific color scheme. Here is what I'm looking for: You have to follow the standards we Folder and Coding Standards We Haveadmin login and Developer login Each Files must be in diffrent folder in the Host. I will provide u following things - HTML Template: - Host - Icon in svg - Font type "Genos Google Font" - Skilled in HTML design and Figma concept - Ability to effectively customize HTML templates. - Experience with maintaining the integrity of a specific color scheme in design. - Quick turnaround time as this project is on an ASAP completion basis

As the creator of a web app, I'm currently seeking an experienced developer with skills in Python or JavaScript to write PyTest or JS Mocha test cases in Selenium Key Details: - Selected person needs to be proficient in both Python PyTest and JavaScript Mocha, as I'm interested in having test cases written in both languages. - The primary function of the pr...key features of this web app include user authentication and database integration. Skills and Experience: - Python or JavaScript expertise - Familiarity with PyTest and Mocha using Selenium testing frameworks - Experience in developing reliable test cases - Knowledge of web applications, particularly with user authentication and database integration features. Contact in chat to get website, login credentials to ...

I want to create a python code capable of web scraping of Vehicles across India from Vahan Parivahan dashboard or any other source.. If I give the Registration Certificate ( RC ) of a vehicle, I want to get all the details of the vehicle. The details include owner name, insurance policy, owner address, chassis number engine number, etc. Person should be able to do this in python and provide me with a code so that I can later on scrape parts of website easily.

I'm eager to enhance my job skills by learning Shopify App Development with a specific focus on building s...Shopify APIs including REST API, GraphQL, and Storefront API. 4. Training needed on Shopify API authorizations and Data retrieval. 5. Training needed on Shopify app development processes including app theme extension development, Polaris, and app bridge utilization. 6. Training needed on Shopify webhooks and proxy for real-time data handling. 7. Training needed on Utilizing the Shopify Partner Dashboard for app management and deployment. 8. Training needed on deploying Shopify apps to development (DEV) and production (PROD) environments. 9. Training needed on Shopify App Store review process and requirements. 10. Training needed on Enabling paid apps for production envir...

I am in need of a professional web and mobile app developer to create a seamless platform that efficiently connects drivers with individuals looking for a wide range of vehicles across bikes. Key Features: - An integrated login system allowing users to access the website and mobile app with the same details. - The primary functionality should center around enabling user interaction and engagement, for instance, connecting customers to service providers (drivers). - The platform will cater mainly to individual users. Ideal Skills and Experience: - Proven experience in developing websites and mobile apps with integrated systems. - Prior experience creating platforms for service delivery focusing on user interaction and engagement. - Strong understanding of database implementation a...

Make a 14 social login web authentication pop up for shopify website. It should require shopify website to login before user can add to cart and proceed to checkout. Build using the following stack: 14 React.js Redux Toolkit Redux Toolkit Thunk Tailwind Css Google Joy-ui Mongodb Mongoose Next-auth to be hosted on Vercel Login should be implemented using next-auth with the following options - Login with Facebook - Login with Google - Login with Mobile number SMS OTP (api documentation ) - Login with Email OTP (for UI please refer to image links)

...Facebook Marketplace. I've created a basic one which you can see in this screenshot: I have some formulas ready to go: Sell through rate: Buy again: I imagine Daily Sales & Expenses, Monthly Sales & Expenses and Buy Again sheets would be locked. The Dashboard sheet would utilize graphs and things like that. It would also be good to have a user-friendly form that the user can fill out for a new piece of inventory or to report a new sale. Key Responsibilities: - Create a specialized Google Sheet that allows me to input, track and visualize my sales data in a comprehensive manner. - The Google Sheets template should include the facility to list and

As the project manager, I'm seeking a skilled Flutter Developer to tackle creating an engaging application that will need to perform a few specific functions. Your expertise will contribute to the development of a top-notch application that's compatible across multiple platforms. Key Tasks: Develop the complete application. - Develop User Authentication and Login processes. - Enable Push Notifications. - Incorporate Database Integration. Compatibility: Our priority is to launch an app that is seamlessly compatible with Android, iOS, and Both Android and iOS platforms. Design Aspects: Existing design guidelines must be meticulously adhered to as we seek to maintain consistency with our brand's identity. Ideal Skills: - Fluency in Flutter and Dart. - Experience wi...

My project needs a seasoned mobile application developer with substantial expertise in Flutter as the development tool. Here's what I need: Platforms: - App should be developed for both iOS and Android platforms Type of App: - Aim is to deliver an E-money wallet app that facilitates digital transactions Required Features: - Provision for user registration and login - An interface for wallet balance management - Facilitate seamless money transfers and transactions If you have previously built similar apps and you have a good understanding of financial technology, you are the perfect match for this job! We've purchased a flutter wallet template () , the canditates are only responsible for api implementation

...my wholesale pharmaceutical business. The main features of the app and site should include: - Daily stock upload: The system must have an interface that supports daily stock uploads using Excel files, ensuring seamless updates on available products. - Order Placement: Customers should be able to browse my products, fill their baskets, and place their orders with ease. - User Registration and Login: Users should be able to create profiles, providing details such as contact information, billing/shipping addresses, and prescription details. Logged-in users should have the option to track their orders and view order history. Freelancers applying for this project must have relevant experience with app and website development and be ready to provide detailed project proposals. This...

I need an expert in Excel who can optimize my current dashboard. Specific tasks will include: - Enhancing the data analysis function of the dashboard - Improving the visualization of sales and HR manpower data The data will be updated on a monthly basis. Therefore, the dashboard should be designed for easy updating and automation. If you have relevant experience in designing and optimizing Excel dashboards, especially for sales and HR data analysis, your skills are highly desirable for this project.

I require an experienced Android developer to create a simple, functioning Android application. Key App Features: - Splash Screen: An eye-catching initial screen. - Login and Signup: Users should be able to sign in and register via their phone number and OTP. - Home Page: This should facilitate features for loading money via UPI payments, mobile recharge, tracking past transactions, as well as accessing help resources. - API Integration: The recharge feature should be integrated with an appropriate API. Ideal skills for this project include Android app development, UPI Payment Integration, API Integration, knowledge of OTP-based registration, and user interface design. Experience with similar projects will be a highly regarded advantage.

Landing Page (E-commerce): A visually appealing landing page resembling an e-commerce platform to deter bots. It will include: Login and registration functionalities. Product view page for browsing items. Customized design for the 404 error page. Verification page for phone numbers. Main Betting Page: A central betting hub where users can bet on HTD (Head, Tail, Draw) outcomes and review their last 11 betting events through a convenient navigation bar. Contact Page: Easily accessible contact page featuring an email contact form for inquiries. Privacy Policy | Risk Disclosure: Clear pages dedicated to privacy policy and risk disclosure to ensure transparency and user understanding. Navigation Bar: The navigation bar will be responsive and user-friendly, featuring: Account icon ...

I'm in need of a capable Laravel developer who can craft a Laravel based cloud which includes some customized requirements. Key features must include: User Management: - User registration - User login - User roles and permissions File Encryption and Management: - Encryption capabilities to ensure file security. Billing and Quotation: - Integration of a billing system to handle transactions. - Quotation function for users to make estimates. Admin Panel: - Capability to manage users, files, and billing. Dynamic Plans and Subscriptions: - The platform needs to host various plans and subscriptions for different levels of users. Experience in Laravel, user interface design, file management systems and secure payment integrations would make you an ideal freelancer for this p...

I'm looking for a proficient Excel expert with extensive experience in data cleaning to assist with a key task. Your primary responsibilities will include: - Identifying and removing duplicate data entries in Excel, Data cleaning - Creating Pivot tables and data aggregations - Efficient dashboard and visuals that showcases trends and patterns via graphical data representation. Please only bid if you are seasoned in creating pivot tables, using Power query and generating visually appealing data insights. Precision and attention to detail are essential skills for this project.

I am looking for a developer who has specific experience in programming languages to improve the admin role capabilities in our current system. The task involves structuring the admin role to create and manage permissions for workers. My website is Key Features: - Design the Admin role to grant the worker permission - Any data inputted by a worker requires Admin approval before it becomes effective Experience Required: - Strong expertise in relevant programming languages - Demonstrated experience in developing systems with similar administrative functions While applying, I would like to know about your past experiences, specifically related to this task. Understanding how you have tackled similar challenges could be invaluable for this project. I am eager

After careful consideration, I am ready to venture into starting an e-commerce site which incorporates user registration and login feature. In Detail: - The primary aspect requires setting up a website for e-commerce. - The crucial function is to implement user registration and login. Ideal Skills for the Project: - Web development - E-commerce development - User experience design This project will ideally suit someone with experience in creating user-friendly e-commerce platforms. Your portfolio should demonstrate a track record in designing similar user login systems.

...features should include: 1. Real-Time Sales Tracking: The app needs to provide real-time sales statistics. This means I should be able to monitor sales as they happen, giving me unparalleled insight into my company's performance. 2. Multi-Level User Access: The app should have a Hierarchical user structure, meaning different sets of information for different users roles. Also, individual user login should be implemented to ensure security and data integrity. 3. Sales Reports and Analytics: The app must be capable of generating comprehensive sales reports. Moreover, it should be equipped with analytics functionalities to gain actionable insight from the sales data. 4. Sales, Inventory and Customer Tracking: The app needs to track not only sales but also the inventory to e...

...and robust website. The website should feature a user registration and login system. Key Features: • User Registration and Login: Users should be able to register with just their names and emails. The system should be simple yet secure, protecting our user's data is of utmost priority. • Advanced Login System: The login system should be equipped with three main features. Two-factor Authentication for enhanced security, a Remember Me option for user convenience, and a Password Recovery tool, in case users forget their credentials. Ideal Skills and Experience: -Proficiency in web development languages -Experience in building user registration and login systems -Knowledge of implementing advanced login features...

I'm in search of a HubSpot expert who can help in successful setup of my system with a particular focus on the Sales Dashboard. As someone new to this software, I need you to navigate the initial setup processes where accuracy is key. Tasks included are: - Configure Hubspot correctly from initial setup. - Design Sales dashboard according to my business requirements. Ideal candidates should have: - Proven experience and expertise with Hubspot (particularly sales dashboard setup) - Ability to explain technical aspects in simple terms. - Maximizing the Saleshub starter with task list and email marketing to defined lists, explaining the flow for deals and tasks. Your help will ensure Hubspot effectively supports my business productivity from the get-go!

...and pay my employees. I am looking for simple Time Tracking software for my employees for each of my locations to better report their work and pay them easily. Need the site to be built in a fast-loading framework (My Employees login with a scanner that types their username and password) Account Types: - Super Admin (Owner) - Manager - Employee - Employee: This User can login, clock in or clock out. They will be able to view their historical reporting to view their worked hours and previous payments made to them by their manager. - Manager: This Manager can login to Create new Employees (Only for the locations they are managing, they cannot see other locations). They can set their employee’s salary type (hourly, weekly or Monthly). And set the Employees u...

...- Menu Display: The main priority of this project is implementing an interactive menu with descriptions and reviews. I am currently open to intuitive and user-friendly suggestions on the menu's design and style. - Social media integration: The website should easily link to various social media platforms, promoting greater visibility and engagement with customers. - Admin Dashboard: A simplified and functional dashboard for the restaurant's management to handle online orders, bookings, and monitor website activity. - AI Chatbot: A chatbot to address customer inquiries instantly. Candidates with proven experience in developing similar platforms and designing interactive user interfaces will be favored. Familiarity with AI chatbot implementation, social media in...

I am in need of a sharp and experienced web developer who can build me an online services-based e-commerce website. Your responsibilities will be: - Constructing a website that incorporates user registration and login features. - Integrating payment processing for a smooth transaction experience for customers. - Lastly, the website should be aimed towards selling services. It would be akin to a Discord model that allows users to charge money to allow people to join high society servers and group chats. Ideal candidates should have solid experience in e-commerce website design, user interface and experience design as well as payment processing integration. Experience with online services is a plus. Your attention to details will be highly appreciated. Let's connect!

...user interface that adapts flawlessly across devices. - **Frontend Development**: Implementation using Angular 17, creating a seamless experience for users. - **Backend Development**: Build a robust .NET 8 C# API backend to handle operations efficiently. - **Database Management**: Utilize Microsoft SQL for secure and scalable data storage. **Crucial Functionalities:** - **User Registration and Login**: Secure and straightforward access for users. - **Real-Time Notifications**: Immediate updates and alerts for users, enhancing engagement. **Essential Features:** - **User Management**: Intuitive admin panel for managing user profiles and permissions. - **Payment Processing**: Incorporate a reliable payment gateway for transactions. - **Content Management**: Easy content updati...

creation . net maui web App Ios and Android. With sepcifiche indicated in chat 3 login forms with fungerprint and pin, setting with activation push and license code, and one to view in multi-page the site dinewme.com. try on by clicking on ACCEDI must also work in app

...feature to my unspecified CRM system. This will require the freelancer to: - Inquire about the specific CRM system I am using to ensure compatibility and understand the structure for implementation purposes. - Develop a solution to track the duration of calls made using the native phone dialler. - Ensure the implemented feature should integrate the call duration details directly on the CRM dashboard. Successful applicants for this project will need to include: - A detailed project proposal, aligning with the requirements outlined. - Information on how they plan to approach the task and implement the solution. - Their experience in similar projects and proficiency in working with various CRM systems. The ideal freelancer should have: - Extensive experience in CRM systems. - P...

I'm seeking an experienced mobile app developer who can create an app for both iOS and Android that handles real-time data. This project not only requires general app development skills but also expertise in user authentication and real-time data handling. - Key Skills Required: - Proficiency in iOS and Android development - Experience in integrating user login and authentication - Expertise in real-time data handling and synchronization I look forward to receiving your bid and discussing the finer details of this project.

I'm seeking a skilled developer to create a unique WordPress plugin urgently. The features desired include the ability to generate custom forms and surveys, enable user authentication and login, all whilst delivering comprehensive data analytics and reporting. Experience with creating similar functionality in WordPress plugins will be a strong advantage. The project completion date required is ASAP.

I'm seeking a skilled developer to create a unique WordPress plugin urgently. The features desired include the ability to generate custom forms and surveys, enable user authentication and login, all whilst delivering comprehensive data analytics and reporting. Experience with creating similar functionality in WordPress plugins will be a strong advantage. The project completion date required is ASAP.

...priority is the optimization of large data sets, because in our production environment with 4,000+ invoices in a MariaDB configuration, loading can take almost an hour when loading a full list. This is impacting productivity. Our office uses Clover as our payment processor. Integration with the Clover API's would be a plus. Eventually we would like for customers to be able to have their own login to be able to see their invoice and payment history. As well as make a payment. Key Responsibilities: • Optimizing the pulling and loading of large invoice lists that will enhance the system's performance. • Integrating Clover as a new payment method and improving PayPal IPIN performance. • Revamping the look and feel of the user interface for a more strea...

...create a website similar to I'm requiring a platform that combines a love for CS 2 and Dota 2, in the form of a case-opening site. ———————————————————————— A prerequisite is the availability of previously completed similar work! reference to the work is required! ————————————————————————- Features I need implemented include: * User Login and Registration - Having a secure and efficient registration and login system for users. * Case Opening Mechanism - Essential for the main oper...

...an advanced Excel spreadsheet that will help track and output several key performance indicators (KPIs) on a monthly basis. The KPI dashboard should integrate the following parameters: - Sales pipeline - Revenue - Over $2,000,000 Per month - Overheads Average 3.75% of revenue for month - Gross profit 12 % - Projects on time >90 % - Defects closed <20 working days - Customer Satisfaction - Employee Productivity - Health and Safety The desired freelancer should have: - Proficient skills in Excel including pivot tables, charts, and formulas - Experience in creating KPI dashboards - Strong understanding of business metrics Please note that the dashboard should be mapped to be updated monthly. The focus is on clarity and ease of interpretation of the data. The ab...

I'm seeking an experienced Wix website developer to create an e-commerce website for my goods & services. I already have some of the product images and descriptions. Key Project Elements: - Customer Login - Building an appealing, easy-to-navigate Wix e-commerce site. - Integrating existing product images and descriptions. Details notes Once integration happened with the product image and description I wanted a customized order page like filtering, searching, etc.... once the customer places an order I have to receive the order in my email. Ideal Skills and Experience: - Proficiency in the Wix platform. - Experience with e-commerce site development. - Proficient in graphic design and copywriting to develop additional product visuals and descriptions. - Proven portfolio ...

I am seeking a competent web designer with a solid track record in crafting professional e-commerce websites. My project entails a site targeting physical product sales. Professionals taking up the job should ensure that the end product has: - Shopping cart functionality, immersing the patrons in a seamless shopping experience - User registration and login, facilitating reliable client data management and personalization - Product rating and review, which accommodates direct feedback from consumers which is critical in product improvement and customer satisfaction Your experience with similar e-commerce website projects will position you perfectly for this job. An understanding of UX and UI design principles and other tools will be advantageous. I am looking forward to your creati...

...and pay my employees. I am looking for simple Time Tracking software for my employees for each of my locations to better report their work and pay them easily. Need the site to be built in a fast-loading framework (My Employees login with a scanner that types their username and password) Account Types: - Super Admin (Owner) - Manager - Employee - Employee: This User can login, clock in or clock out. They will be able to view their historical reporting to view their worked hours and previous payments made to them by their manager. - Manager: This Manager can login to Create new Employees (Only for the locations they are managing, they cannot see other locations). They can set their employee’s salary type (hourly, weekly or Monthly). And set the Employees u...

...RESTful API using ASP.NET Core. - User registration and login system. Users should be able to easily create an account and login. and develop endpoints for: User authentication (signup, login, logout) using JWT tokens CRUD operations for managing books (create, read, update, delete) Searching books by title, author, genre, etc. Handling user orders and transactions 3 .Integrate an MSSQL database to store user information, book details, and orders. - Book browsing and search capabilities. The application must present an intuitive interface where users can browse books and search by title, author, genre, etc. FRONTEND: a responsive user interface using React.js. components for: User authentication (signup, login) Displaying book catalog with searc...

I'm looking to build a online bookstore application utilizing ASP.NET Core API, React frontend,Mvc, and MSSQL database. The application should possess main features which include: - User registration and login - Product search and listing - Shopping cart and checkout The application will incorporate different user roles and permissions: - Administrators with full access - Other users with appropriate limited access. To be successful in this job, Freelancers should showcase their past work on related projects along with a representation of their comprehensive abilities. Your past experience in building comprehensive, user-friendly online applications will be invaluable as you implement these essential features. Note- My project is almost ready but i am stuck with the conne...

...develop and publish a visually appealing and interactive application that seamlessly provides users with insurance quotes and policy purchases, while educating them about the importance of sustainability through exciting quizzes. By effectively combining climate action, education, and insurance procedures - the app will serve as a multi-faceted platform. The apps will also need an administrator dashboard to: 1) Access user data and activity 2) Send Push Notifications 3) Add/Edit/Remove quiz databank - for each question, manage type, category, difficulty level etc. 4) Manage users 5) Manage badge and point system 6) Manage main app screen educational content The gamification will require: 1) On Demand quizzes - utilizing the question bank 2) Compete quizzes - where users can ...

I'm in need of a professional who is skilled in HTML and HopeUI, particularly comfortable with transforming mockups into a polished dashboard UI. It is crucial for potential candidates to be proficient in using a database as a data source. Experience in responsive UI design and strong knowledge of HTML are mandatory, while proficiency in HopeUI is highly desired. If you have a keen attention to detail and are experienced in turning mock-ups into fully functional code, you might be the perfect fit for this project.

I'm seeking an experienced Quickbase consultant for my company in East Texas. As we're looking to streamline our operations, we're particularly interested in the application's real-time production and budget tracking features. Key Requirements: - Implement a responsive Quickbase dashboard to track production and budgets in real time - Help us monitor the quantity and cost of production - Integrate the new system with our existing software Skills and Experience: - Experience with Quickbase platform - Knowledge in production tracking and budgeting - Excellent problem-solving skills - A willingness to travel This consulting position will require proficiency in Quickbase, a strong understanding of operational processes, as well as excellent project management sk...

1,.Set Start order at 1000 2. Disable on main page Extras Keep only "Affiliate" the Fillter By Price on product page left side. 4.login and register URLS change to SEO urls same with contact us and Returns and sitemap in footer i have added al SEO urls.. but i think does URLS is theme setting and i dont know how to edit them i think this is theme related 5. Theme Banner Slider Have Title and Subtitle but no color change for text. diffuclt to use banner black with black text. Need to ad color palet to the Title and Subtitle for Text on banner. THeme. 6. On main banner there is a "Shopping now" button Change Text to "Shop now!" 7. Remove Search button on header for theme and also wishlist and compare. 8. Rename Latest Reviewws on main page to &...

Necesito un dashboard con los datos de una startup, identificar sus insights, ventas, ticket de conversión, entre otros aspectos que se detallan luego. Cualquier interesado no dude en aplicar, saludos

I am looking to develop a ...development would need to include several key features: • Interactive quizzes • Video tutorials • Discussion forums • LMS+CMS+communication tools The portal will be a resource for various forms of educational content such as: • Textbooks • Courses • Class notes • Assignments To ensure security, I require user authentication and access control through: • Login with email and password The ideal freelance candidate would be experienced in both web and mobile application development, with a specific focus on eLearning platforms. They would also have a strong understanding of user authentication methods. Familiarity with LMS (Learning Management Systems) and CMS (Content Ma...

I'm seeking an experienced web developer to create a secure eCommerce site specializing in selling eBooks. Key Responsibilities: - Devise and implement a user authentication system to bolster site security - Establish an intuitive interface for a seamless buying and customer login experience - Ensure the website is optimized for eBook purchases Project description: develop a client-server-based application of their choice using django. The application developed must have the following functionality: 1. Login page ((i) must be able to log in/out, (ii) change password, (iii) be able to add new users/customers with least privileges) 2. Input field (such as feedback forum, contact page) 3. Buy or sell products 4. Database to store data focus on: (i) Authentication...