ASP.NET-MVC-Study/BlazorApp/RankingApp-WebAPI/Areas/Identity/Pages/Account/LogOut.cshtml

@page
@using Microsoft.AspNetCore.Identity
@attribute [IgnoreAntiforgeryToken]
@inject SignInManager<IdentityUser> SignInManager
@functions {
    public async Task<IActionResult> OnPost()
    {
        if (SignInManager.IsSignedIn(User))
        {
            await SignInManager.SignOutAsync();
        }

        return Redirect("~/");
    }
}