text: from ma import ma
  from models.user import UserModel
  
  class UserSchema(ma.SQLAlchemyAutoSchema):
      class Meta:
          model = UserModel               # create marshmallow fields based on our UserModel
          load_only = ("password",)
          dump_only = ("id",)
          load_instance = True
  
  
  # class UserSchema(Schema):
  #     class Meta:                             # create a Meta class inside the Schema to define the load_only and the dump_only
  #         load_only = ("password",)           # * Password is load_only, we are only going to use when we load, we are never going to return the password --> Note: we usa a tuple
  #         dump_only = ("id",)                 # * Id is dump_only, we are only going to use when we return, we are never going to send the id when we load --> Note: we usa a tuple
  #     id = fields.Int()   
  #     username = fields.Str(required=True)
  #     password = fields.Str(required=True)
  