I created а user through email (create new request through email from а user who doesn't have account at the Portal). User's account automatically was created at the Portal. It has login like email ( user@demo.local) and null domain. 

Then I tried to log in with user@demo.local and email's password with local authentication. But I can't log in.

What password and "log on to" method I  will  need to use? Or how do I get the password?