More generic error message on login

[taylorfinelli]

Error message should say "Incorrect email or password"

[mva919]

A thing to note here is that even though we will update the error message to be more generic it will still up the kind of error in the response from the cognito API.

[taylorfinelli]

https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pool-managing-errors.html#:~:text=Amazon%20Cognito%20supports%20customizing%20error,disable%20user%20existence%20related%20errors.

[mva919]

Good find, idk why this isn't enabled by default