Integrate file storage APIs module to our website

Dear All, I need someone who much be very strong in PHP to help us integrate an existing file storage APIs module to our website. Our website is a file storage website that we store file in backblaze (a cloud storage similar amazon S3). We have made a module to store files in backblaze bucket in the old version of our website, but now we have a new version of website and we want to transfer that module from old version to new version (I will provide you the old version for reference) Please check this module in the attachment... and take a look of B2 api here [login to view URL] (we already done all in the module, and just need to integrate it to new version of our website) Make sure after integration: - Files upload/download/delete from our website to B2 bucket work ok. - File of separate user will be stored in different folders in the bucket (B2) - File remove from Trash work ok - When we delete a user => whole file of that user (their folder in the bucket) will also be deleted from the bucket Thanks for reading