3D character sliding movement,3D Character Sliding

Hi! I want to add sliding feature(pressing ctrl button while running makes character slide) but I don't really know how to add it. This is my code so far:

 public float moveSpeed, gravityModifier, jumpPower, runSpeed = 12f;
 public CharacterController charCon;

 private Vector3 moveInput;

 public Transform camTrans;

 public float mouseSensitivity;
 public bool invertX;
 public bool invertY;

 private bool canJump, canDoubleJump;
 public Transform groundCheckPoint;
 public LayerMask whatIsGround;

 public Animator anim;

 // Start is called before the first frame update
 void Start()
 {
     
 }

 // Update is called once per frame
 void Update()
 {
     //moving *old*
     /*moveInput.x = Input.GetAxis("Horizontal")*moveSpeed*Time.deltaTime;
     moveInput.z = Input.GetAxis("Vertical")*moveSpeed*Time.deltaTime;*/

     //store y velocity
     float yStore = moveInput.y;

    
     //moving *new*
     Vector3 vertMove = transform.forward * Input.GetAxis("Vertical");
     Vector3 horiMove = transform.right * Input.GetAxis("Horizontal");

     moveInput = horiMove + vertMove;
     moveInput.Normalize();

     if (Input.GetKey(KeyCode.LeftShift))
     {
         moveInput = moveInput * runSpeed;
     }else
     {
         moveInput = moveInput * moveSpeed;
     }

     moveInput.y = yStore;

     moveInput.y += Physics.gravity.y*gravityModifier * Time.deltaTime;

     if(charCon.isGrounded)
     {
         moveInput.y = Physics.gravity.y * gravityModifier * Time.deltaTime;
     }

     canJump = Physics.OverlapSphere(groundCheckPoint.position, .25f, whatIsGround).Length > 0;


     //Handle Jumping
     if(Input.GetKeyDown(KeyCode.Space) && canJump)
     {
         moveInput.y = jumpPower;

         canDoubleJump = true;
     } else if (canDoubleJump && Input.GetKeyDown(KeyCode.Space))
     {
         moveInput.y = jumpPower;

         canDoubleJump = false;
     }

     charCon.Move(moveInput * Time.deltaTime);

     //control camera rotation
     Vector2 mouseInput = new Vector2(Input.GetAxisRaw("Mouse X"), Input.GetAxisRaw("Mouse Y")) * mouseSensitivity;

     if(invertX)
     {
         mouseInput.x = -mouseInput.x;
     }
     if(invertY)
     {
         mouseInput.y = -mouseInput.y;
     }
     transform.rotation = Quaternion.Euler(transform.rotation.eulerAngles.x, transform.rotation.eulerAngles.y + mouseInput.x, transform.rotation.eulerAngles.z);

     camTrans.rotation = Quaternion.Euler(camTrans.rotation.eulerAngles + new Vector3(-mouseInput.y, 0f, 0f));

     anim.SetFloat("moveSpeed", moveInput.magnitude);
     anim.SetBool("onGround", canJump);
 }