Azure AD | ASP.NET Core | Check if user is in Policy Group

controller.cs

private IAuthorizationService _AuthorizationService;

public HomeController(IAuthorizationService AuthorizationService)
{
    this._AuthorizationService = AuthorizationService;
}

[Authorize(Policy = "SecurityGroup")]
public async Task<IActionResult> About()
{
    if((await _AuthorizationService.AuthorizeAsync(User, "SecurityGroup")).Succeeded)
    {
        //
    }
    
    return View();
}