Question How to get player's name when player click button

Hi! I'm making to multiplayer game using Mirror. In the scene player can choose characters by clicking the buttons. But I know to how to tell unity which player is clicking on that button. How to get player's name who click the button?

 

I added if (isLocalPlayer) still not work

Code (CSharp):

1.  public void BeomeThisCharacter(int num)
2.     {
3.         if (isLocalPlayer)
4.         {
5.             character.GetComponent<SpriteRenderer>().sprite = characterChoice[num];
6.             character.AddComponent<Animator>();
7.             character.GetComponent<Animator>().runtimeAnimatorController = animeControl[num];
8.         }
9.     }