/// <summary>
        /// Gets auth hdr value
        /// </summary>
        /// <param name="user"></param>
        /// <param name="pass"></param>
        /// <returns></returns>
        private static string GetAuthorizationHeaderValue(string user, string pass)
        {
            var cfg = ServiceConfig.Read();

            switch (cfg?.AuthorizationScheme?.ToLower())
            {
            case "basic":
                return(GetAuthorizationHeaderValue(
                           System.Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes($"{user}:{pass}"))
                           ));
            }

            return(null);
        }
        /// <summary>
        /// Gets auth hdr value
        /// </summary>
        /// <param name="authToken"></param>
        /// <returns></returns>
        private static string GetAuthorizationHeaderValue(string authToken)
        {
            var cfg = ServiceConfig.Read();

            return($"{cfg?.AuthorizationScheme} {authToken}");
        }