Plz help me

If somone can help me this code is for a joystick and i want when i move the to the left or the right to rotate

Code (csharp):

1.  using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. public class JoystickControler : MonoBehaviour
5. {
6.     public float speed;
7.     public Joystick Joystick;
8.     public Rigidbody rb;
9.     public void FixedUpdate()
10.     {
11.         Vector3 direction = Vector3.forward * Joystick.Vertical + Vector3.right * Joystick.Horizontal;
12.         rb.AddForce(direction * speed * Time.fixedDeltaTime, ForceMode.VelocityChange);
13.     }
14. }

Ps. I 4 month's ago i started using unity

 

There's nothing in this code about rotation. If you want to use the physics system to rotate you apply torque instead of applying a force. There's lots of other ways of applying a rotation as well. Check out the answers here for more ideas.
https://answers.unity.com/questions/1441242/how-can-i-rotate-rigidbody-and-not-violate-physics.html

 

Ok, thank you. but how can i implement it in the code