Get a key-value from storage according to the key name.

def get(self, key):
        """Get a key-value from storage according to the key name.
        """
        data = r_kv.get(key)
        # data = json.dumps(data) if isinstance(data, str) else data
        # data = json.loads(data) if data else {}

        return build_response(dict(data=data, code=200))