How to get MAC address of client machine using Angular

I am trying to get the mac-address of client's machine whenever they click the button. (This is for office purpose only).

I have read multiple SO answer and in that they mentioned we can't do it using JavaScript but still am not satisfied with answer.

However I still managed to get client IP address using the below code but as the IP will be dynamic therefore I have to check for MAC address.

Code to get the client IP address .

 ngOnInit(){         this.getUserIP(function(ip){            console.log(ip)        });    }getUserIP(onNewIP) { //  onNewIp - your listener function for new IPs            //compatibility for firefox and chrome            // console.log("onNewIP" , onNewIP);            // (<any>window).mozRTCPeerConnection             var myPeerConnection = (<any>window).RTCPeerConnection || (<any>window).mozRTCPeerConnection  || (<any>window).webkitRTCPeerConnection;            var pc = new myPeerConnection({                iceServers: []            }),            noop = function() {},            localIPs = {},            ipRegex = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,            key;            function iterateIP(ip) {                if (!localIPs[ip]) onNewIP(ip);                localIPs[ip] = true;            }         //create a bogus data channel         pc.createDataChannel("");            // create offer and set local description            pc.createOffer(function(sdp) {                sdp.sdp.split('\n').forEach(function(line) {                    if (line.indexOf('candidate') < 0) return;                    line.match(ipRegex).forEach(iterateIP);                });                pc.setLocalDescription(sdp, noop, noop);            }, noop);             //listen for candidate events            pc.onicecandidate = function(ice) {                if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return;                ice.candidate.candidate.match(ipRegex).forEach(iterateIP);            };        }

Why I want to get MAC address

When the user signup in my software , later I want that user to make request from that machine only. Therefore I need the MAC address. Is this not possible?