where can I find the secret key for the JWT from cognito

Question

I am trying out the log in function for the Cognito User Pool for my Web App. I was able to obtain the Token but I am not sure where to find the secret to decode it. I\'ve rea

Answer 1

Just want to summarize this topic with the snippet of code:

const jwkToPem = require('jwk-to-pem');
const requestify = require('requestify');

/**
 * Get cognito's secret key
 * @param {String} region
 * @param {String} userPoolId
 * @returns {Promise}
 */
function getPem(region, userPoolId) {
  const jwkUrl = `https://cognito-idp.${region}.amazonaws.com/${userPoolId}/.well-known/jwks.json`;

  return requestify.request(jwkUrl, { method: 'get', dataType: 'json'})
    .then(res => res.getBody()['keys'].shift())
    .then(jwk => jwkToPem(jwk))
  ;
}