public HttpClient CreateClient()
{
if (_httpClient == null)
{
_httpClient = new HttpClient();
}
_httpClient.DefaultRequestHeaders.Clear();
DateTime dtNow = DateTime.UtcNow;
var saltKey = Guid.NewGuid().ToString();
_httpClient.DefaultRequestHeaders.Add("token", ValidateHelper.GetToken(dtNow, saltKey));
_httpClient.DefaultRequestHeaders.Add("version", AppConfigurations.AppVersion.ToString());
_httpClient.DefaultRequestHeaders.Add("sk", saltKey);
return(_httpClient);
}