User and server port mapping in squid

 I have a use case where I install a proxy manager in the server,after that I open several ports in the server,say 30000-40000.So after I start the proxymanager I am able to use the proxy , so for using the proxy I put serverip and port in the browser. But since anyone with serverip:port can use the proxy so I want to restrict the access by authentication so it should be in this way serverip:port:username:password , also one more check should be there that port and username mapping should be there like one user will be able to access only the assigned port.