Hmm. Not sure.
I see you accepted the invitation to join the team on GitHub, so it ought to work.
Maybe try making a new token, and make sure it has repo permissions when you make it.
I can take a look next week, but in the meantime you can always use the git bash commands. It may be better to learn them well anyway.
Or you can use Eclipse for some commands, and just do git push
from Git Bash.