msgraph: subscription for users

src/Bundle/ChillMainBundle/Entity/User.php

@@ -359,10 +359,17 @@ class User implements AdvancedUserInterface
         }
     }
 
+    public function setAttributeByDomain(string $domain, string $key, $value): self
+    {
+        $this->attributes[$domain][$key] = $value;
+
+        return $this;
+    }
+
     /**
      * Merge the attributes with existing attributes.
      *
-     * Only the key provided will be created or updated.
+     * Only the key provided will be created or updated. For a two-level array, use @see{User::setAttributeByDomain}
      */
     public function setAttributes(array $attributes): self
     {