I had the same problem and I checked the password and user everywhere - they were equal. The computer name also. And the problem was in the buttun "can login" in user's Previleges - it had to bу in "on" possition. And after I turn it on, the advice do the command with the flag: "python -Xutf8 manage.py makemigrations", "python -Xutf8 manage.py migrate"