Power BI embed token expiration listener method

setTokenExpirationListener.ts

setTokenExpirationListener(tokenExpiration, 
  minutesToRefresh = 2){
  // get current time
  var currentTime = Date.now();
  var expiration = Date.parse(tokenExpiration);
  var safetyInterval = minutesToRefresh * 60 * 1000;

  // time until token refresh in milliseconds
  var timeout = expiration - currentTime - safetyInterval;


  // if token already expired, generate new token and set the access token
  if (timeout <= 0) {
    console.log("Updating Report Embed Token");
    this.updateToken();
  }
  // set timeout so minutesToRefresh minutes before token expires, token will be updated
  else {
    console.log("Report Embed Token will be updated in " + timeout + " milliseconds.");
    setTimeout(()=>{
      this.updateToken();
    }, timeout);
  }
}