GameSerializer's model isn't Game; PlayerSerializer's model isn't Player; ScoreSerializer's model isn't Score. Why??

from rest_framework import serializers
from . import models
#create a ModelSerializer for each of the three models, Game, Player, and Score. Name them ModelNameSerializer, e.g. PlayerSerializer.
#This Serializer is meant for a feedback page. classes are defined accordingly.
#serializers are classes,hence, we will define classes
#Convert Model Instances into JSON and backend and reverse.
class GameSerializer(serializers.ModelSerializer):
    class Meta:
        models = models.Game
        #in models.py the fields are defined
        #fields = ()


#We need to explicitly specify which fields are needed to be serialized, so we define them under fields
class PlayerSerializer(serializers.ModelSerializer):
    class Meta:
        models = models.Player
        #fields = ()


class ScoreSerializer(serializers.ModelSerializer):
    class Meta:
        models = models.Score
        #fields = ()