BadRequest - Function to return Status Bad Request Response (400) use it if user request is wrong.

Conflict - Function to return Conflict Response (409) Use it in case if a process create a new resource, but somehow, another resource already exist (collision in unique identifier).

Forbidden - Function to return Forbidden Response (403) Use it for any user attempting to access resource with lack of authorization.

InternalServerError - Function to return Internal Server Error Response (400) use it for any unhandled error that is not user's fault.

NewFailedResponse will return a json envelope (wrapper) to theHTTP Error response code.

NotFound - Function to return Not Found Response (404) Use it in case of any get operation that retrieve for resource and not exist.

OK - Function to return Status OK Response (200).

Unauthorized - Function to return Unauthorized Response (401) Use it only in authentication process.

type helpers.