diff --git a/src/UserStore.php b/src/UserStore.php
index f824ef6..fd6e9d5 100644
--- a/src/UserStore.php
+++ b/src/UserStore.php
@@ -22,6 +22,6 @@ public function store($user)
 
     public function findByIdentity($identity)
     {
-        return $identity->belongsTo($this->model, 'user_id')->first();
+        return $identity->belongsTo($this->model, 'user_id')->firstOrFail();
     }
 }