In the existing implementation when the response from the API Call is missing which means the raw response payload is None or empty string including whitespaces, then return None instead of the same payload. The fix is in the json_deserialize utility in ApiHelper class.
### Tasks
- [x] Add the guard clause in the `json_deserialize` utility.
- [x] Add the unit tests around the change
In the existing implementation when the response from the API Call is missing which means the raw response payload is None or empty string including whitespaces, then return None instead of the same payload. The fix is in the
json_deserializeutility in ApiHelper class.