msgraph: add metadata to users to connect with default calendar

src/Bundle/ChillMainBundle/Entity/User.php

@@ -350,15 +350,20 @@ class User implements AdvancedUserInterface
     }
 
     /**
-     * Set attributes.
+     * Merge the attributes with existing attributes.
      *
-     * @param array $attributes
-     *
-     * @return Report
+     * Only the key provided will be created or updated.
      */
-    public function setAttributes($attributes)
+    public function setAttributes(array $attributes): self
     {
-        $this->attributes = $attributes;
+        $this->attributes = array_merge($this->attributes, $attributes);
+
+        return $this;
+    }
+
+    public function unsetAttribute($key): self
+    {
+        unset($this->attributes[$key]);
 
         return $this;
     }