Fix user model.

app/User.php

@@ -3,6 +3,7 @@
 namespace FireflyIII;
 
 use Illuminate\Foundation\Auth\User as Authenticatable;
+use Zizaco\Entrust\Traits\EntrustUserTrait;
 
 /**
  * Class User
@@ -11,6 +12,8 @@ use Illuminate\Foundation\Auth\User as Authenticatable;
  */
 class User extends Authenticatable
 {
+    use EntrustUserTrait;
+
     /**
      * The attributes that are mass assignable.
      *