/// <summary>
/// Checks whether a contact is currently registered with the server
/// </summary>
/// <param name="e164number">The contact to check.</param>
/// <param name="token">The cancellation token</param>
/// <returns>An optional ContactTokenDetails, present if registered, absent if not.</returns>
/// <exception cref="IOException"></exception>
public async Task <ContactTokenDetails?> GetContactAsync(string e164number, CancellationToken?token = null)
{
if (token == null)
{
token = CancellationToken.None;
}
string contactToken = CreateDirectoryServerToken(e164number, true);
ContactTokenDetails?contactTokenDetails = await pushServiceSocket.GetContactTokenDetailsAsync(contactToken, token);
if (contactTokenDetails != null)
{
contactTokenDetails.Number = e164number;
}
return(contactTokenDetails);
}
