Sorry, something went wrong:- The password supplied with the username Domain\UserName was not correct. Verify that it was entered coorectly & try again.
You can login in central admin with same username & password but you will prompt for new web application or existing web application.
For that, existing application check IIS & set username & password again in Application Pool of web application--> Advance settings.
If still the problem persist try the following command in powershell:-
stsadm -o updatefarmcredentials -userlogin Domain\UserName -password YourPassword
Hope, this will help.. :-)