Fix support for authorization using sanctum tokens

app/Models/PersonalAccessToken.php

@@ -36,6 +36,17 @@ class PersonalAccessToken extends Model implements HasAbilities
         return $this->belongsTo(User::class);
     }
 
+    /**
+     * Required for support with Laravel Sanctum.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     * @see \Laravel\Sanctum\Guard::supportsTokens()
+     */
+    public function tokenable()
+    {
+        return $this->user();
+    }
+
     /**
      * Determine if the token has a given ability.
      *