Looking for logging into the Sourcetree site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Sourcetree site. After that you can login as usual with your login credentials.
https://mseeeen.msen.jp/requires-github-authentication-many-times-with-sourcetree/
https://id.atlassian.com/
https://community.atlassian.com/t5/Sourcetree-questions/SourceTree-Login-failed-for-your-Bitbucket-account-The-remote/qaq-p/28761
https://community.atlassian.com/t5/Sourcetree-questions/How-do-I-login-to-Sourcetree/qaq-p/771251
https://qiita.com/BlueTone/items/ab6eb489ff4dcd66a72e
https://teratail.com/questions/100881
http://proengineer.internous.co.jp/content/columnfeature/6983
https://reasonable-code.com/sourcetree-invalid-error/
https://eng-entrance.com/sourcetree
https://www.sourcetreeapp.com/
https://stackoverflow.com/questions/35436994/cannot-login-to-sourcetree
https://autumnsky.sakura.ne.jp/2018/09/bitbucket_authentification_loop/
https://tracpath.com/bootcamp/learning_git_sourcetree.html