/// <summary>
/// Authenticate on the server
/// </summary>
/// <param name="userName">user name for authentication</param>
/// <returns><c>true</c> - authentication success</returns>
public AuthenticationResult Authenticate(string userName)
{
if (ConnectedUsers.Exists(u =>
String.Compare(u.Context.UserName, userName, StringComparison.OrdinalIgnoreCase) == 0))
{
return(AuthenticationResult.Failed());
}
IConsoleCallback callback = OperationContext.Current.GetCallbackChannel <IConsoleCallback>();
_currentUser = new ConnectedUser(ServerConsole.Authenticate(userName), callback);
ConnectedUsers.Add(_currentUser);
return(AuthenticationResult.Success(ConnectedUsers.Count - 1));
}