Assist in the implementation of a REST JSON API and oauth2

We would like somebody to help implement our website's JSON REST API. We are using the fat- free framework ([login to view URL]). We are using the f3-core version with composer in the current project. The current job is listed in the following design requirements; however, we may have future jobs once this has been completed and analysed. The current requirements are as follows: *Use existing MySQL database. *User authentication using oauth2 (user table already exists). *Users can authenticate on a per-application bases. Applications can be stored in the database. Permissions must be grantable for each indervidual application. E.G: allow uploading, allow updating user information, allow reading of personal user information (e-mail). * Using the fat-free framework. Project has already been started, must have a gitlab account. * All results are returned using JSON. * To be as secure as possible. Endpoints are as follows: + /user/show/:ID show user information (currently just username). + /post/show/:ID show post information (title, description, download URL). * /post/add/ Uploads a new audio file. Accepts title and description args as well as the file. File must be uploaded as the authenticated user. Key: * = Requirement. + = Already implemented; however, taking advice and updates. We are using phinx ([login to view URL]) for database migrations. The migrations for the current website are stored with the new API project.