Close response closer to the other close scenario.

client.go

@@ -581,7 +581,6 @@ func (c *Client) checkResponse(resp *http.Response, err error) (*http.Response,
 	}
 
 	if resp.StatusCode < 200 || resp.StatusCode > 299 {
-		defer func() { _ = resp.Body.Close() }()
 		return resp, c.getErrorFromResponse(resp)
 	}
 
@@ -591,6 +590,8 @@ func (c *Client) checkResponse(resp *http.Response, err error) (*http.Response,
 func (c *Client) getErrorFromResponse(resp *http.Response) APIError {
 	// check whether the error response is declared as JSON
 	if !strings.HasPrefix(resp.Header.Get("Content-Type"), "application/json") {
+		defer func() { _ = resp.Body.Close() }()
+
 		aerr := APIError{
 			StatusCode: resp.StatusCode,
 			message:    fmt.Sprintf("HTTP response with status code %d does not contain Content-Type: application/json", resp.StatusCode),