public class PermissionRequirement : IAuthorizationRequirement
{
     public string Permission { get; }
    public PermissionRequirement(string permission)
    {
        this.Permission = permission;
    }
}



//HANDLE

  public class PermissionAuthorizationHandler : AuthorizationHandler<PermissionRequirement>
{
      UserManager<ApplicationUser> _userManager;
      RoleManager<ApplicationRole> _roleManager;
       private readonly ILogger<PermissionAuthorizationHandler> _logger;


    public PermissionAuthorizationHandler(UserManager<ApplicationUser> userManager, RoleManager<ApplicationRole> roleManager,ILogger<PermissionAuthorizationHandler> logger)
    {
        _userManager = userManager;
        _roleManager = roleManager;
        _logger = logger;

    }

protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, PermissionRequirement requirement)
        {
            _logger.LogWarning("Evaluating authorization requirement for ops >= {age}");

             var role = context.User.IsInRole("testes");
           if(role)
           {
             _logger.LogWarning("Evaluating authorization requirement for ops >= {age}");
           }


            // Check the user's age


            return Task.CompletedTask;
        }
}



//startup.cs
 options.AddPolicy("Over21Only",
                        policy => policy.Requirements.Add(new PermissionRequirement("juliocostaa@icloud.com")));
  });

//Controller
  [Authorize(Policy = "Over21Only")]
              public IActionResult Index()
        {


            return RedirectToAction("Dashboard1");
        }