asInputStream
Streams the response content. This stream must be consumed either by reading from it and calling close, or calling consume to discard the contents.
> If the response is consumed as a stream, asBytes will return an empty array, asString will return an empty string and both asJSONArray and asJSONObject will throw exceptions.
Return
an InputStream from the response content
Throws
if the stream could not be created or has already been consumed