Getting client id and client secret from config file.

config.json

+{
+    "client_secret": "YOUR_CLIENT_SECRET",
+    "client_id": "CLIENT_ID"
+}
\ No newline at end of file

main.js

 const RPC = require("discord-rpc");
 const rpc = new RPC.Client({ transport:"ipc"});
 const os = require('os');
+const conf = require('./config.json')
 
-let clientId= 'CLIENT_ID';
-let clientSecret = 'CLIENT_SECRET';
+let clientId= conf.client_id;
+let clientSecret = conf.client_secret;
 let totalmem = os.totalmem()/1024/1024/1000;
 let freemem = os.freemem()/1024/1024/1000;
 let usedmem= totalmem - freemem;