Sliding animation after running

Hi there,

I peeled the Internet and I didn't find any answer. I'm working on a 2D game where I'm doing the player animations. It's a Spine Character and I AM NOT using the New Input System. I'm using KeyCode / Mouse Button to trigger Movement and animations.

My player runs with the LeftShift. I want to do a "braking" animations once he stops running, like the speed of his runs makes him trip a bit before completely stops.

I'm trying to call the function with KeyCodeUp, I see that it kinda works cuz my Debug.Log is appearing, but the animation won't play (see code below).

Can someone please help me ? I've lost too many days on this (I'm a one year old developer, stil struggling with some stuff).

THANKS !

[CODE]

 void Start()
 {
     player = GetComponent<Rigidbody2D>();
     skeletonAnimation = GetComponent<SkeletonAnimation>();  
     currentstate = "Idle";
     SetCharacterState(currentstate);
     
 }

 // Update is called once per frame
 void Update()
 {
     
     playerPos = player.position;
     temp = Input.mousePosition;
     temp = Camera.main.ScreenToWorldPoint(temp);
     GetMousPos();
     Move();
     StartCoroutine(StopRunning());

   
 }

 public void SetAnimation(AnimationReferenceAsset animation, bool loop, float timeScale) {
     if (animation.name.Equals(currentAnimation))
     {
         return;
     }

     skeletonAnimation.state.SetAnimation(0, animation, loop).TimeScale = timeScale;
     currentAnimation = animation.name;
 }

 public void SetCharacterState(string state)
 {
     if (state.Equals("Idle"))
     {
         SetAnimation(idle, true, 0.3f);
     }
     if (state.Equals("Walking"))
     {
         SetAnimation(walking, true, 1f);
         speed = 2;
     }
      if (state.Equals("WalkingReverse"))
     {
         SetAnimation(walkingReverse, true, 1f);
         speed = 2;
     }

     // if (state.Equals("Aiming"))
     //{
     //    SetAnimation(aiming, false, 0.5f);
     //}

      if (state.Equals("Running"))
     {
         SetAnimation(running, true, 1f);
         speed = 4;
     }

     if (state.Equals("Slide")) 
     {
         SetAnimation(slide, false, 0.5f);
         speed =3;
     }
 }

 public void Move()
 {
     movement = Input.GetAxis("Horizontal");

     player.velocity = new Vector2(movement * speed, player.velocity.y);
     player.AddForce(player.velocity, ForceMode2D.Force);
     //player.position = Vector2.Lerp(player.position, player.position*movement, speed);
     

     if (movement != 0)
     {
        StartCoroutine(StopRunning());
        if (isflipped)
         {

         if (movement > 0 )
         {

                 if (Input.GetKey(KeyCode.LeftShift))
                 {

                     SetCharacterState("Running");
                    
                 }

                 else { SetCharacterState("Walking"); }
             

         }
         
     else { 
             SetCharacterState("WalkingReverse"); 
         }

         }

        if (!isflipped)

         {
             if (movement < 0)
             {
                if (Input.GetKey(KeyCode.LeftShift))
                 {
                     SetCharacterState("Running");
                 }
                 else { SetCharacterState("Walking"); }

             }

             else
             {
                 SetCharacterState("WalkingReverse");
             }

         }
     
     }

   
     else 
     {
         SetCharacterState("Idle");
     }

     
 }

 private IEnumerator StopRunning()
 {
      if ( Input.GetKeyUp(KeyCode.LeftShift))
         {

             SetCharacterState("Slide");
             Debug.Log("J'ai arrêté de courir");
             yield return new WaitForSeconds(3f);
         }

 }

 public void GetMousPos()
 {
     if (temp.x > player.transform.position.x)
     {
         isflipped = true;
     }

     else
     {
         isflipped = false;
     }
 }

[/CODE]