The gitlab ssh protocol cannot be used. The public key has been added and no password has been set. However, I still need to enter the password when pushing, but there is no password! ! Entering the login password for gitlab doesn't work, reinstalling git and resetting the SSH key doesn't work either. I've tried all the methods I can find online, including two related questions on segmentfault and after more than 10k reads, no one can give the correct answer ( /q/10...), so I tried to post it and hope someone can answer it! ! !