Looking for logging into the Sharepoint Aspx Display 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 Sharepoint Aspx Display User site. After that you can login as usual with your login credentials.
https://sharepoint.stackexchange.com/questions/146658/get-current-logged-in-user-and-display-it-on-the-site-as-hello-username
https://sharepoint.stackexchange.com/questions/146658/get-current-logged-in-user-and-display-it-on-the-site-as-hello-username/146661
https://social.msdn.microsoft.com/Forums/lync/en-US/0797f616-d371-4d93-9174-b2af31327e93/get-current-logged-in-user-details-of-sharepoint-site-in-aspnet-page-by-adding-sharepoint?forum=sharepointcustomizationprevious
https://stackoverflow.com/questions/5487248/show-sharepoint-content-based-on-user-login
https://www.c-sharpcorner.com/uploadfile/Chandresh.P/display-information-of-current-login-user-in-sharepoint-site/
https://blog.vinewave.com/how-to-sign-in-as-different-user-in-sharepoint-2013-2016-on-premise-956f1790d721
https://zimmergren.net/sharepoints-hidden-user-list-user-information-list/
https://www.credera.com/blog/technology-insights/microsoft-solutions/how-to-sign-in-as-a-different-user-in-sharepoint-2013/
http://rules.ssw.com.au/do-you-know-how-to-fix-peoples-display-name-in-sharepoint
https://support.office.com/en-us/article/display-a-web-page-folder-or-file-on-a-classic-sharepoint-page-7f61feec-9b3d-4805-a960-07636ba59527
https://store.bamboosolutions.com/kb/article.aspx?id=10829
https://laurakokkarinen.com/sharepoint-online-guest-user-troubles-and-how-to-get-past-them/
http://code.i-harness.com/en/q/46d9ec