public static async Task GetToken()
{
string tokenURL = string.Format(B2CConfig.TokenURL, B2CConfig.Tenant, B2CPolicy.SignInPolicyId, B2CConfig.ClientId, PreferenceHandler.GetAccessCode());
var response = await InvokeApi.Authenticate(tokenURL, string.Empty, HttpMethod.Post);
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
string strContent = await response.Content.ReadAsStringAsync();
var tokenNew = JsonConvert.DeserializeObject <AccessToken>(strContent);
PreferenceHandler.SetToken(tokenNew.id_token);
PreferenceHandler.SetRefreshToken(tokenNew.refresh_token);
}
}