Play animation when two keys are pressed.

When my character walks diagonally I want my facing right or facing left animation to play based on the key combinations ( W and D, W and A, S and D, S and A).

I still want my character to move diagonally, but I don't want the animations to switch between up/right, etc. I'm unsure if I need a separate method to handle this, along with a separate animation controller. I know that I'll be using something similar to this for when the combinations of keys are pressed simultaneously, but the animations still switch between up/right.

 if (Input.GetKey(KeyCode.W) && (Input.GetKey(KeyCode.D))
  {
     FacingDirection = Facing.RIGHT;
  }

Here is my current player movement code:

 private void TakeInput()
 {
     direction = Vector2.zero;
     
     if(Input.GetKey(KeyCode.W))
     {
         direction += Vector2.up;
         FacingDirection = Facing.UP;
     }
     if (Input.GetKey(KeyCode.A))
     {
         direction += Vector2.left;
         FacingDirection = Facing.LEFT;
     }
     if (Input.GetKey(KeyCode.S))
     {
         direction += Vector2.down;
         FacingDirection = Facing.DOWN;
     }
     if (Input.GetKey(KeyCode.D))
     {
         direction += Vector2.right;
         FacingDirection = Facing.RIGHT;
     }