sample_secondary_email_check.js

const request = require('request');
exports.main = async (event, callback) => {  
  
  /* BE SURE TO ADD THE CONTACT ID INTO THE 'PROPERTY TO INCLUDE IN CODE' SECTION OF THE CUSTOM CODED ACTION */
  const contact_id = event.inputFields['hs_object_id'];  
 
  /* LOOK UP THE CONTACT VIA THE ID AND RETRIEVE THE PROPERTY 'hs_additional_emails' */
  var options = {
    "method": "GET",
    "url": "https://api.hubapi.com/crm/v3/objects/contacts/" + contact_id + "?hapikey=" + process.env.HAPIKEY + "&properties=hs_additional_emails"
  };
  let secondary_exists = true;
  request(options, function (error, response, body) {
    const obj = JSON.parse(body);    
    /* GATHER THE SECONDARY EMAIL VALUE */
    let secondary_email = obj.properties.hs_additional_emails;   
    
    /* IF THERE ISN'T A VALUE FOR SECONDARY EMAIL ADDRESS, SET IT AS "NO VALUE" */
    if(secondary_email == null) {
       secondary_exists = false;
       secondary_email = "No Value";
    }    
    
   /* DON'T FORGET TO ADD THE TWO CALLBACK OUTPUT FIELDS INTO THE DATA OUTPUTS SECTION OF YOUR CUSTOM CODED ACTION. YOU CAN USE THESE VALUES TO DETERMINE NEXT STEPS IN YOUR WORKFLOW */
    callback({
      outputFields: {
        secondary_email: secondary_email,
        secondary_exists: secondary_exists,
      }
    });
  });
}