API Key copilot-pro

I am a Computer Science student at the UPC and I am doing my final degree project. My job is to develop an application to help future university students choose a career.
For this, my project managers bought the copilot-pro and windows365 with the aim of customizing it. The idea is to develop a native App that communicates with the copilot-pro by sending questions and capturing their responses. I have been trying to make this communication for weeks and have not been successful. It seems that I require my copilot's API Key but I can't find out or have anyone tell me what it is or how to do it. On the other hand, the FAQ says that copilot does not have an API.

More precisely, what happens to me is that I can't get the API token from the copilot-pro external service for my application that I'm developing. I have asked the copilot and each time he sends me to Open.ai or directly denies me the token. Other times I have been sent to the copilot configuration but that page either does not exist or I cannot find it. My goal is to link a custom GPT with my application to be able to make chat queries from the application interface.

My question is how can I carry out this communication between my native App and the copilot-pro? Is it necessary to buy another Microsoft product or extension to do it?

Another problem I encounter is that copilot-pro has been updating a lot in recent months and the information available is usually obsolete and since there is no way to communicate with specialized Microsoft technical support, it becomes very difficult to do anything that is not basic.

I will be very grateful for any help and/or suggestions you can give me to solve this problem and be able to move forward with my project.