Looking for logging into the Visual Studio 2015 User 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 Visual Studio 2015 User site. After that you can login as usual with your login credentials.
https://stackoverflow.com/questions/34303044/how-can-i-switch-my-signed-in-user-in-visual-studio-2015
https://social.msdn.microsoft.com/Forums/vstudio/en-US/9dab3f96-8c2b-435e-b476-403173d3429f/login-form-in-visual-basic-2015-?forum=vbgeneral
https://docs.microsoft.com/de-de/visualstudio/ide/signing-in-to-visual-studio
https://www.c-sharpcorner.com/article/creating-login-form-with-authentication-for/
https://www.c-sharpcorner.com/article/login-form-in-c-sharp-connected-with-database-for/
https://www.oreilly.com/library/view/microsoft-visual-studio/9780134133164/ch02lev2sec6.html
https://developercommunity.visualstudio.com/content/problem/38667/vs-is-repeatedly-asking-me-to-login.html
https://visualstudio.uservoice.com/forums/121579-visual-studio-ide/suggestions/7791495-stop-signing-me-out-of-visual-studio-and-msdn
https://www.seoclerk.com/faq/9998/How-to-create-a-login-form-in-Visual-Studio-2015-Vb-net
https://github.com/github/VisualStudio/issues/1718
https://www.codepool.biz/how-to-log-in-tfs-as-a-different-user.html
https://dba.stackexchange.com/questions/107556/unresolved-reference-to-user-after-importing-as-a-vs-db-project
https://bhrnjica.net/2012/11/14/how-to-change-tfs-user-name-and-password-in-visual-studio-2012/