I need to make a connection with sockets, where I connect with an IP address and port and start to listen for connections, so part of the code I'm using is this:
The problem is that I need to connect to that IP address, using a user and password that was assigned to me, but I don't know how to implement that.
To do anything useful when connecting to a socket, you need to know the protocol being used -- i.e., what data is going to be exchanged, and in what format, in what order. Part of that knowledge would be how authentication was done. There's an infinite number of possible ways it could be done -- you have to know what the protocol is.
Now, that said: if it's a standard protocol, folks here might help you. What do you know about it? What kind of service is it supposed to be?
Sorry, the protocol is smpp I need to send a sms to a server (with that IP) and the server should redirect the message to my application, so my application needs to listen in that port for the redirected message to arrive.