add system user perm api (#4108)

apps/perms/api/system_user_permission.py

@@ -0,0 +1,21 @@
+
+
+from rest_framework import generics
+from common.permissions import IsValidUser
+from orgs.utils import tmp_to_root_org
+from .. import serializers
+
+
+class SystemUserPermission(generics.ListAPIView):
+    permission_classes = (IsValidUser,)
+    serializer_class = serializers.SystemUserSerializer
+
+    def get_queryset(self):
+        return self.get_user_system_users()
+
+    def get_user_system_users(self):
+        from perms.utils import AssetPermissionUtil
+        user = self.request.user
+        with tmp_to_root_org():
+            util = AssetPermissionUtil(user)
+            return util.get_system_users()