If the user already exists, but tries to sign up again using the original email but a different password, rather than prompt the user that the email already exists, the error returned is password_does_not_match. This is because technically users can log in via the sign up form.
If the user already exists, but tries to sign up again using the original email but a different password, rather than prompt the user that the email already exists, the error returned is
password_does_not_match
. This is because technically users can log in via the sign up form.