loginflow.cs

using Teamwork;
using Teamwork.Shared;
using Teamwork.Shared.Common;

private async Task<Teamwork.Client> HandleOauthAuthentication(string code, string state)
 {
    var response = await LoginFlow.TeamworkLoginFlow.GetLoginDataAsync(code);

    // Use response to initialize a new instance of the Teamwork APi Client
    return Client.GetTeamworkClient(
           pDomain: response.AccountData.Account.URL,
           pApiKey: response.TokenData.AccessToken,
           pUseOauth: true);
}