Player Arm will not rotate when moving with Xbox Joystick

Hello,

My problem is I can't get my player's arm to move when a weapon is selected. I'm using an Xbox One controller and have the inputs in Unity. I can move the arm with the mouse and have it face the position the mouse is pointing at but I can't make it work with the controller.

My code to make the players arm move with mouse...

 public void CanTurn()
     {
         Vector2 direction = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
         float angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
         Quaternion rotation = Quaternion.AngleAxis(angle, Vector3.forward);
         transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Speed * Time.deltaTime);
     }

I've looked at the API and many tutorials and and still nothing has worked. I thank anyone that stops by to look or helps.

Thank You.