How to set up a new user for a github repository?

Question

git

I go from one computer to two different repositories under different users (User1 and User2). The first one works as it should, but I can’t write to the second one, it swears that there is no access for User1. But the second repository belongs to User2 and its config contains

[user]
  name = User2
  email = [email protected]

How to set up to make everything work?

Answer 1

The second user probably just doesn't have a valid ssh key.
https://help.github.com/articles/generating-ssh-keys