https://<username>:<password>@bitbucket.org/<username>/<repo>.git

D:sharedProject> cd /path/to/your/project
D:sharedProject> git init
D:sharedProject> git remote add origin https://bitbucket.org/USERNAME/project.git
D:sharedProject> git-credential-winstore.exe

D:sharedProject> git push
Failed to erase credential: Element not found
fatal: Authentication failed for 'https://bitbucket.org/USERNAME/project.git/'

D:sharedProject> git push
Counting objects: 102, done.
Delta compression using up to 8 threads.
... etc. ...

address: git:bitbucket.org (remeber the preceding "git:")
user: USERNAME
pass: old incl!"§§$%&, new without!"§$%%&/( (your passphrase!)