Which npm module should be used to send push notification to Apple(iphone) in node js?

I want to send push-notifications to iphone by using node.js server-side language I found npm two modules for doing that

1. https://www.npmjs.com/package/apns

   var apns = require("apns"), options, connection, notification;
   
   options = {
    keyFile : "conf/key.pem",
    certFile : "conf/cert.pem",
    debug : true
   };
   
   

   connection = new apns.Connection(options);

I have only single pem file but they are asking about two pem files key.pem and cert.pem

2. https://www.npmjs.com/package/apn

     var options = {
       token: {
        key: "path/to/key.p8",
        keyId: "T0K3NK3Y1D",
        teamId: "T34M1D"
     },
     production: false
    };
   
   var apnProvider = new apn.Provider(options);
   
   

In this, they are asking about key, keyId. teamId. But how can I get this ?

Which npm module should I used for sending Apple push notifications ?

I have pem file and bundle id of my app. Are they sufficient to send push notifications to Apple user or not ?

Also can't figure out which npm module is best suited for sending the same ? Any suggestions are always welcome regarding this.

Thanks for the help

via VIKAS KOHLI