when you enter the credentials for example on the azure portal Chrome or any other browser saves the login info, so next time you have already the username in the login box, I notice that you are using Incognito window, in this case your login will not be saved or displayed.
see this link
https://support.google.com/chrome/answer/95606?hl=en&co=GENIE.Platform%3DDesktop
hope this helps
Cheers
Luca