check the user id
There's little more deflating in the tech world than your computer rejecting your User ID and Password.
You re-type your password more carefully. No good.
You check your "Caps Lock" button to be sure it's not on. It's not.
You consult your trusty list of passwords. "That's what I typed!" you insist. You enter it again, even more slowly this time. Still no good.
You reluctantly click "Forgot Password" and attempt to prove you are you in order to create a new password. A half hour later you forgot what site you were trying to access.
My advice: at the first "rejection," check the User ID. You might have mis-typed that. (No one ever checks that.)
Entry into a secured website requires the correct password and User ID. The password may be correct but you might have typed ".con" instead of ".com," or left out a character, or mistakenly entered your old/other email address. Rejected. Rejected. Rejected.
Some error messages actually say "The User Name or Password is incorrect." Don't assume it's always the password.