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In the first picture, you seem to be logged into an account. The account you linked before that however, seems to be missing. Did you request for account deletion by mistake?
Have you tried using the “forgot password” feature? I see it in your second screenshot. You need an email connected to your Replit account (you said yours was Yahoo), so it will send you an email with a reset code. Getting back in should be easy. However, if the password changed without your consent, then that is alarming.