Hi ces0148800,

Have you tried to reset your password?
If not, here's an article that will explain how to:
https://khanacademy.zendesk.com/hc/en-us/articles/202487480-How-do-I-reset-my-password-

Hi there,

If you're unable to access the account and the password reset isn't working, you'll need to create a support ticket describing the issue.