Having spaces on username results on error

Issue Summary

Sourcetree for Mac doesn't allow spaces in usernames when trying to access Bitbucket Server. Bitbucket Server does indeed accept them so this creates an error every time a user with a space in his username tries to use Sourcetree.

On the other hand, Sourcetree for Windows does currently allow spaces in the username.

Workaround

Users will need to temporarily remove any spaces from their username.