I was included as a collaborator in a college's homework. When I perform a push I get this:
remote: Permission to somename/Sistema-Estatistica.git denied to diegowebuzz.
fatal: não foi possível acessar 'https://github.com/somename/Sistema-Estatistica.git/': The requested URL returned error: 403
Clone, pull works as expected!
When I perform a push, I am asked my username and password. I am sure I provide those correctly.