Create a Simple RESTful API using OAuth2

I need someone that can create a simple restful api in PHP using mysql db, and using OAuth2 for authentication. Here is a list of API calls that I need implemented: DATABASE (limited) client (developer) -company_name -email -phone -website -verified -epc_address -epc_balance client_employee -name -email -phone client_app -name -has_android_version -has_iphone_version client_user -client_app_id -epc_balance client_transaction -action(add|subtract) -amount -date client_user_transaction -source(user|client) -action(add|subtract) -amount -date WEBSITE sign up -company name -email Add APP -name -has Android -has iPhone dashboard: -Company Name (edit) -Email (edit) -EPC Wallet ID -EPC Balance -Withdraw -List of Apps (Add|remove) Transaction -List of transaction (Date|App ID| Source | Action | Amount) Users -List of Users (User ID | App ID | Wallet ID | Balance | Date Created) API CALLS /user/create (client_id|client_app_id) - if successful returns client_user_id | wallet_id (the wallet ID main function is so that users can add to their balance if they wish to do so) - errors - - invalid client_id - - invalid client_app_id - - system error /user/deposit (client_id|client_user_id|amount) - subtracts from client's balance adds to user's balance - if successful returns TRUE - errors - - invalid client_id - - invalid client_user_id - - invalid amount - - insufficient balance (client's balance is not enough to cover the transaction) - - system error /user/withdrawal (client_id|client_user_id|amount) - subtracts from users's balance adds to clients's balance - if successful returns TRUE - errors - - invalid client_id - - invalid client_user_id - - invalid amount - - insufficient balance (users's balance is not enough to cover the transaction) - - system error /user/get_balance (client_id|client_user_id) - get users balance - if successful returns returns balance - errors - - invalid client_id - - invalid client_user_id - - system error /get_balance (client_id) - get client's balance - if successful returns returns balance - errors - - invalid client_id - - system error The file structure should be easy to navigate, code needs to be commented and intended correctly. You must ensure that when requesting info, each client is authorizes for that data, for example, if get /user/get_balance, the user_id has to belong to client_id, etc You must provide API documentation for Developers that will use this API!!