Use the Authentication Guard that is defined in the users config file. (#107)

* Update ServiceProvider.php

Use Authentication Guard defined in the configuration file.

* inline

---------

Co-authored-by: Duncan McClean <[email protected]>

Author: tao

src/ServiceProvider.php

@@ -30,6 +30,6 @@ public function bootAddon()
                 'avatar' => $user->avatar(),
                 'initials' => $user->initials(),
             ];
-        });
+        }, ['guards' => [config('statamic.users.guards.cp')]]);
     }
 }