feat: update user and flight models and add comment and admin models

app/Models/User.php

@@ -104,4 +104,8 @@ class User extends Authenticate
 	{
 		return $this->hasMany(Passenger::class);
 	}
+    public function comments()
+    {
+        return $this->hasMany(Comment::class, 'user_id');
+    }
 }