code: def make_instance(cls, data):
          
          schema = cls()
  
          if not hasattr(schema.Meta, 'model'):
              raise AttributeError("In order to make an instance, a model for "
                                   "the schema must be defined in the Meta "
                                   "class.")
  
          serialized_data = schema.load(data).data
  
          return cls.Meta.model(**serialized_data)
docs: Validate the data and create a model instance from the data.
  
          Args:
              data (dict): The unserialized data to insert into the new model
                  instance through it's constructor.
  
          Returns:
              peewee.Model|sqlalchemy.Model: The model instance with it's data
                  inserted into it.
  
          Raises:
              AttributeError: This is raised if ``Meta.model`` isn't set on the
                  schema's definition.