Build a JWT With a Private Key

index,js

const njwt = require('njwt');

const privateKey=`
-----BEGIN PRIVATE KEY-----
...
...
-----END PRIVATE KEY-----
`
const clientId = "test"; // Or load from configuration
const now = Math.floor( new Date().getTime() / 1000 ); // seconds since epoch

const claims = {
  "name": "bRuN1N05"
};
const jwt = njwt.create(claims, privateKey, 'RS256')
  .setIssuedAt(now)
  .setIssuer(clientId)
  .compact();
console.log(jwt)