Check to see if 400 error is validation error (invalid_field)

Author: LukeXF

lib/Client.ts

@@ -28,7 +28,8 @@ function sendRequest<T>(options: request.UriOptions) {
           const firstErr = (data.errors && Array.isArray(data.errors) && data.errors.length !== 0) ? data.errors[0] : undefined;
           switch (response.statusCode) {
             case 400:
-              reject(new Exceptions.Malformed(`${firstErr.message}: ${firstErr.field}` || "Not Found"));
+              const message = firstErr.code === "invalid_field" ? `${firstErr.message}: ${firstErr.field}` : firstErr.message;
+              reject(new Exceptions.Malformed(message || "Not Found"));
 
               return;
             case 401: