Integrating Payoneer

Hi, I have been working on integrating payoneer in wordpress. To be specific is to have a function of retrieving Payees Details and able to View Card Applications, etc. What i need is to help me to get the payee’s details and other informations and save it to the database after it request API from payoneer.

Here is the API guide from Payoneer’s Website https://partners.payoneer.com/WebApps/Admin/Files/APIGuide.pdf

Here is the plugin i am working
https://pastebin.com/XnLLsjLd