code: def scan_model_keys(cls, count=None):
          
  
          pattern = cls.make_key(
              cls._name,
              "*",
          )
  
          return cls.database.scan_keys(pattern, count)
docs: Iter on all the key related to the current model, using redis SCAN command
  
          Parameters
          ----------
          count: int, default to None (redis uses 10)
              Hint for redis about the number of expected result
  
          Yields
          -------
          str
              All keys found by the scan, one by one. A key can be returned multiple times, it's
              related to the way the SCAN command works in redis.