How to add a user to an application in development?

Question

I want to test the developed application on another account. I get the access token using the method "/oauth2/authorize?client_id=*****&response_type=code". As a result, I get a key that is different in length from the one that I generated in the app console, in addition, when I execute any request in the dropbox, I get a 401 Unauthorized status

FALSHER · Accepted Answer

I was able to solve my problem myself. For authorization using the Bearer method, you need exactly the same long access token that can be obtained with response_type=token