diff --git a/rsconcept/backend/apps/users/admin.py b/rsconcept/backend/apps/users/admin.py
index 2b7afa88..317e45f0 100644
--- a/rsconcept/backend/apps/users/admin.py
+++ b/rsconcept/backend/apps/users/admin.py
@@ -7,6 +7,7 @@ User = get_user_model()
 
 
 class CustomUserAdmin(UserAdmin):
+    ''' Admin model: User. '''
     fieldsets = UserAdmin.fieldsets
     list_display = (
         'username',