DeferClose captures and prints the error from closing (if an error occurs).

DeleteBodyOK will DELETE and returns the body or an error if the response is not okay.

DoBodyOK returns the body or an error if the response is not okay(StatusCode >= 400).

GetBodyOK returns the body or an error if the response is not okay.

PostBodyOK will POST and returns the body or an error if the response is not okay.

PutBodyOK will PUT and returns the body or an error if the response is not okay.

ReadErrorBody in the error case ready the body message.