Update serializers.py

-from rest_framework import serializers
-from api.models import User
-
-
-class UserSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = User
-        fields = '__all__'
-
-
-class SignUpSerializer(serializers.ModelSerializer):
-    password2 = serializers.CharField(style={"input_type": "password"})
-
-    class Meta:
-        model = User
-        fields = ['user_id', 'name', 'password', 'password2']
-
-    def create(self, data):
-        user_id = data['user_id']
-        name = data['name']
-        password = self.data['password']
-        password2 = self.data['password2']
-
-        if user_id and User.objects.filter(user_id=user_id).exclude(name=name).exists():
-            raise serializers.ValidationError({"user_id": "User_id must be unique."})
-
-        elif password != password2:
-            raise serializers.ValidationError({'password': "Passwords must match."})
-
-        user = User.objects.create(
-            user_id=data['user_id'],
-            name=data['name'],
-            password=data['password'],
-        )
-        user.save()
-
-        return user
-
-
-class UserInfoSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = User
-        fields = ['user_id', 'name', 'total_size', 'current_size']
-