Custom Wordpress Plugin (940442)

I need a custom login script in PHP for my WORDPRESS blog that will use an external API (XML) for authentication. The login script will create a new record in Wordpress MySQL database at first login. After a user has logged in, I need a custom plugin to be coded in PHP that checks user credentials against the external API to grant access to specific pages. Full instructions are offered with specifications and instructions. You must be able to start working on this project IMMEDIATELY once selected