Return a bad request when any of the query string parameters are invalid

[SamSedivy]

Replace default values with a bad request stating that the required parameters are invalid

[AlanSimmons]

@SamSedivy Can you add logic that returns a 400 error if the endpoints are missing required parameters?

[SamSedivy]

@AlanSimmons Yes, I can add the same logic to the other endpoints that have required parameters.