Like the title says, every time I fetch/pull/push/whatever I get a window from Git Credentials Manager for Windows asking me to log in on Visual Studio Online (where the repository is hosted). When I close the window, the operation I started works perfectly fine, so I really don't need to enter my credentials. The credential manager window also pops up when I'm not doing anything (probably when Sourcetree is refreshing automatically or something like that). This is driving me insane. I tried uninstalling the credential manager both through system git and through Sourcetree's embedded git (I'm using embedded), but I still get the popups.
How can I stop this?