I cannot login while fetching, pulling or pushing while my credentials are fine, what's the problem?

[Arnoudt Rotte]

I can only do these functions while using git bash and after 4 times logging in.(2 times with normal login and 2 times with ssh login). Also if I change my repo settings etc. to use ssh it doesn't work in sourcetree. I'm really out of options here. I'm trying to work on my examproject but even my teacher doesn't know how to resolve.