I am new to Github. I am trying to push my code to Github. But it is showing me the below error.
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to 'firstname.lastname@example.org:519ebayproject/519ebayproject.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Merge the remote changes (e.g. 'git pull')
hint: before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.