Connect4 - Live game with SignalR and Blazor

Index.razor.cs

 public class IndexComponent: ComponentBase 
 {
     private IdentityUser _currentUser;

     [Inject]
     protected AuthenticationStateProvider AuthenticationStateProvider { get; set; }

     [Inject]
     protected UserManager < IdentityUser > UserManager { get; set; }
     
     protected override async Task OnInitializedAsync() 
     {
         await base.OnInitializedAsync();

         _currentUser = await GetUser();
     }

     private async Task < IdentityUser > GetUser() 
     {
         var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
         var claimsPrincipal = authState.User;

         var user = await UserManager.GetUserAsync(claimsPrincipal);

         return user;
     }
 }