function.js

// This function calls Segment's Profile API to fetch a user's Traits.  Similarly, we can fetch 
// a user's Event history, Metadata, Account Hierarchies, and more.

const axios = require('axios');

exports.handler = function(context, event, callback) {
  // Initialize an axios client with the base URL of Segment's Profile API and your Segment API token 
  // for Basic Authentication.
  const profile = axios.create({
    baseURL: `https://profiles.segment.com/v1/spaces/${context.spaceId}/collections/users/profiles`,
    auth: {
      username: context.token,
      password: '',
    }
  });
  
  // Fetch a user's traits using email as the identifier.  To fetch a user's event history, query the `/events`
  // endpoint.
  profile
    .get(`/email:${event.email}/traits`)
    .then((response) => {
      return callback(null, response.data.traits);
    })
    .catch((error) => {
      console.log(error);
      return callback(error);
    });
};