public async Task <FbToken> GetFbToken()
{
try
{
var client = new HttpClient();
var url = _stringshelper.CreateTokenRequestUrl();
var response = await client.GetAsync(url);
var result = await response.Content.ReadAsStringAsync();
return(JsonConvert.DeserializeObject <FbToken>(result));
}
catch (Exception) { return(null); }
}