Self Defined Status Code

200 : "Success!"

450 : "General Bug Found."
451 : "This Email has been registered."
452 : "This username has been registered.
453 : "You cannot rate twice on the same course."
454 : "You cannot use reserved or bad words in your username"

460 : "You have not logged in."
461 : "The account has not been activated."
462 : "Email Sending Fail"

470 : "Parameter Missing"
471 : "Invalid Parameter"
472 : "Invalid Course ID"
473 : "Invalid or Expired Activation Token"
474 : "Please provide a valid NTU Email"
475 : "Invalid Email or Password"