public IActionResult Index()
        {
            // Validate whether all the required configurations are provided in appsettings.json
            string configValidationResult = ConfigValidator.ValidateConfig(azureAd);

            if (configValidationResult != null)
            {
                Console.Error.WriteLine(configValidationResult);
                return(BadRequest(configValidationResult));
            }
            return(View());
        }