/// <summary>
/// Exchanges an authorization code for an access token and refresh token
/// </summary>
/// <param name="authorizationCode">The authorization code</param>
/// <returns>An access token, its expiration date, and a refresh token</returns>
private async Task <(string accessToken, string refreshToken, DateTime expiration)> GetTokens(string authorizationCode)
{
string redirectUri = Properties.Settings.Default.RedirectUri;
string clientId = Properties.Settings.Default.ClientId;
string clientSecret = Properties.Settings.Default.ClientSecret.DecryptString();
TokenApi tokenApi = new TokenApi()
{
AuthorizationHeader = new AuthorizationHeader(clientId, clientSecret)
};
dynamic json = await tokenApi.GetAccessCode(
authorizationCode,
redirectUri,
errorCallback : (errorResponse) =>
{
MessageBox.Show(
errorResponse,
"Login failure",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
});
int expiresInSeconds = json.expires_in;
DateTime expiration = DateTime.UtcNow.AddSeconds(expiresInSeconds);
return(json.access_token, json.refresh_token, expiration);
}