When I go in the Ctrl+Alt+F1-F6, the password doesn't work

When I go in the Ctrl+Alt+F1-F6, the password doesn't work

I can't do commands in the Ctrl+Alt+F1-F6. When I do a command, it asks me
my password. When I write it, it doesn't work. I've tried it enough times
to know that it's broken/there's a problem.