Why is git throwing a 403 error?

Question

git

Good afternoon.
I joined a project that was led by another programmer, a problem arose.
I need to merge the changes with git, I do git pull, it gives
error: The requested URL returned error: 403 while accessing https://github.com/PROJECT/info/refs
fatal: HTTP request failed
How to fix this? I'm not the creator of the repository, just connected. Everything works fine on my local copy.
Moreover, the project is combat, failures cannot be allowed.

Answer 1

use key authentication.
How to set up work with gitHub in the PHPStorm console if two-factor authentication is enabled? with comments.

Answer 2

you do not have access to the repository. learn English or use a translator

Answer 3

There is no access to the repo, mb ssh authorization is used .. If the project is combat, then who immediately tests the edits on the combat?