How to automate JWT creation in Postman

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Since a Bearer Token has a life of 12 hours. I made additions to script to get tokens only when they expire.

const tokenUrl = pm.environment.get( 'api-url' ) + '/oauth/token';
const clientId = pm.environment.get("pat-id");
const clientSecret = pm.environment.get("pat-secret");

const getTokenRequest = {
  method: 'POST',
  url: tokenUrl,
  body: {
      mode: 'formdata',
      formdata: [
          { key: 'grant_type', value: 'client_credentials' },
          { key: 'client_id', value: clientId },
          { key: 'client_secret', value: clientSecret }
      ]
  }
};


var moment = require('moment');
if(!pm.environment.has('time')){
    pm.environment.set('time',moment());
}

if(moment(pm.environment.get('time')) < moment())
{
    var time = moment();
    time.add(12,'hours');
    pm.environment.set('time',time);
    pm.sendRequest(getTokenRequest, (err, response) => {
    const jsonResponse = response.json();
    const newAccessToken = jsonResponse.access_token;
    pm.environment.set('access_token', newAccessToken);
});

}
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