core: add avatars to user api

passbook/core/api/users.py

@@ -1,22 +1,32 @@
 """User API Views"""
-from rest_framework.serializers import BooleanField, ModelSerializer
-from rest_framework.viewsets import ModelViewSet
 from rest_framework.decorators import action
 from rest_framework.request import Request
 from rest_framework.response import Response
+from rest_framework.serializers import (
+    BooleanField,
+    ModelSerializer,
+    SerializerMethodField,
+)
+from rest_framework.viewsets import ModelViewSet
 
 from passbook.core.models import User
+from passbook.lib.templatetags.passbook_utils import avatar
 
 
 class UserSerializer(ModelSerializer):
     """User Serializer"""
 
     is_superuser = BooleanField(read_only=True)
+    avatar = SerializerMethodField()
+
+    def get_avatar(self, user: User) -> str:
+        """Add user's avatar as URL"""
+        return avatar(user)
 
     class Meta:
 
         model = User
-        fields = ["pk", "username", "name", "is_superuser", "email"]
+        fields = ["pk", "username", "name", "is_superuser", "email", "avatar"]
 
 
 class UserViewSet(ModelViewSet):
@@ -26,6 +36,7 @@ class UserViewSet(ModelViewSet):
     serializer_class = UserSerializer
 
     @action(detail=False)
+    # pylint: disable=invalid-name
     def me(self, request: Request) -> Response:
         """Get information about current user"""
         return Response(UserSerializer(request.user).data)