Called by Lightstreamer Kernel, through the Remote Server, instead of calling the 3-arguments version, in case the Server has been instructed to acquire the client principal from the client TLS/SSL certificate through the <use_client_auth> configuration flag. 

Note that the above flag can be set for each listening port independently (and it can be set for TLS/SSL ports only), hence, both overloads may be invoked, depending on the port used by the client. 

Also note that in case client certificate authentication is not forced on a listening port through <force_client_auth>, a client request issued on that port may not be authenticated, hence it may have no principal associated. In that case, if <use_client_auth> is set, this overload will still be invoked, with null principal. 

See the base 3-arguments version for other notes. 

Edition Note: https connections are not enabled in Allegro edition. 

Edition Note: https connections are not enabled in Moderato edition. 

void NotifyUser(string user, string password, IDictionary httpHeaders, string clientPrincipal);

void NotifyUser(string user, string password, IDictionary httpHeaders, string clientPrincipal);

Function NotifyUser(user As string, password As string, httpHeaders As IDictionary, clientPrincipal As string) As void