/// <inheritdoc/>
public async Task <string> GetChatThreadIdAsync(string userId, string appId)
{
if (string.IsNullOrWhiteSpace(userId))
{
throw new ArgumentNullException(nameof(userId));
}
if (string.IsNullOrWhiteSpace(appId))
{
throw new ArgumentNullException(nameof(appId));
}
var installationId = await this.appManagerService.GetAppInstallationIdForUserAsync(appId, userId);
var retryPolicy = PollyPolicy.GetGraphRetryPolicy(GraphConstants.MaxRetry);
var chat = await retryPolicy.ExecuteAsync(async() => await this.graphServiceClient.Users[userId]
.Teamwork
.InstalledApps[installationId]
.Chat
.Request()
.WithMaxRetry(GraphConstants.MaxRetry)
.GetAsync());
return(chat?.Id);
}