/// <summary>
/// Register/Unregister a Google Cloud Messaging registration ID.
/// </summary>
/// <param name="gcmRegistrationId">The GCM id to register. A call with an absent value will unregister.</param>
/// <param name="token">The cancellation token</param>
/// <returns></returns>
/// <exception cref="IOException"></exception>
public async Task SetGcmIdAsync(string gcmRegistrationId, CancellationToken?token = null)
{
if (token == null)
{
token = CancellationToken.None;
}
if (gcmRegistrationId != null)
{
await pushServiceSocket.RegisterGcmIdAsync(gcmRegistrationId, token);
}
else
{
await pushServiceSocket.UnregisterGcmIdAsync(token);
}
}