Instead of just throwing exception on 401 auth, throw exception for any
error code from 400 on
This can be turned off with the option "http_errors" set to false
Also updaed the exception content to match 400 or 500 error type with
more information attached
General Exception error codes:
Cnnn: Curl errors (FAILURE)
Rnnn: general class errors (ERROR)
Hnnn: http response errors (ERROR)
