Looking for logging into the User Failed 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 User Failed site. After that you can login as usual with your login credentials.
https://www.linguee.jp/%E8%8B%B1%E8%AA%9E-%E6%97%A5%E6%9C%AC%E8%AA%9E/%E7%BF%BB%E8%A8%B3/user+authentication+failed.html
https://msdn.microsoft.com/ja-jp/library/ab4e6cky.aspx
https://context.reverso.net/%E7%BF%BB%E8%A8%B3/%E8%8B%B1%E8%AA%9E-%E6%97%A5%E6%9C%AC%E8%AA%9E/login+failed
https://context.reverso.net/%E7%BF%BB%E8%A8%B3/%E8%8B%B1%E8%AA%9E-%E6%97%A5%E6%9C%AC%E8%AA%9E/failed+login
https://stackoverflow.com/questions/17372606/sqlserver-login-failed-for-user
http://itproguru.com/expert/2014/09/how-to-fix-login-failed-for-user-microsoft-sql-server-error-18456-step-by-step-add-sql-administrator-to-sql-management-studio/
https://kb.tableau.com/articles/issue/error-login-failed-for-user-run-as-username-editing-data-connection?lang=ja-jp
https://kb.tableau.com/articles/issue/error-login-failed-for-user-nt-authority-anonymous-logon?lang=ja-jp
https://knowledgebase.progress.com/articles/Article/SiteSync-test-connection-fails-User-authentication-failed
https://www.jprog.com/wiki/Receiving-error-Login-failed-for-user-cwbt.ashx
https://wordpress.org/support/topic/login-failed-for-moderated-registration-even-after-activated-new-user/
https://www.paypal.com/ba/smarthelp/article/why-did-i-get-the-error-user-authentication-failed-or-merchant-identification-error-ts1223
https://collaborationhelp.cisco.com/article/WBX71166