Move user view to uncloud_pay

uncloud/uncloud_pay/serializers.py

@@ -1,3 +1,4 @@
+from django.contrib.auth import get_user_model
 from rest_framework import serializers
 from .models import Bill, Payment
 
@@ -10,3 +11,11 @@ class PaymentSerializer(serializers.ModelSerializer):
     class Meta:
         model = Payment
         fields = ['owner', 'amount', 'source', 'timestamp']
+
+class UserSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = get_user_model()
+        fields = ['username', 'email']
+
+    def get_balance(self, obj):
+        return 666