Warning: Permanently added 'github.com,192.30.252.121' (RSA) to the list of known hosts.
To git@github.com:BirkhoffLee/Telegram-Warning-Bot
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to 'git@github.com:BirkhoffLee/Telegram-Warning-Bot'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.