Sending custom response on JWT Bearer Auth failure

Program.cs

var bld = WebApplication.CreateBuilder(args);
bld.Services
   .AddAuthenticationJwtBearer(
       s => s.SigningKey = "...",
       o =>
       {
           o.Events = new()
           {
               OnChallenge =
                   async ctx =>
                   {
                       ctx.HandleResponse();

                       if (ctx.AuthenticateFailure is not null)
                           await ctx.Response.SendErrorsAsync([new("Security", "You are unauthorized!")], 401);
                   }
           };
       })
   .AddAuthorization()
   .AddFastEndpoints()
   .SwaggerDocument();

var app = bld.Build();
app.UseAuthentication()
   .UseAuthorization()
   .UseFastEndpoints(
       c => c.Endpoints.Configurator =
                ep =>
                {
                    if (ep.AnonymousVerbs is null)
                        ep.Description(b => b.Produces<ProblemDetails>(401));
                })
   .UseSwaggerGen();
app.Run();