intercom search error

index.js

const axios = require("axios");

var basicAuth = {
  auth: {
    username: process.env.INTERCOM_TOKEN,
    password: "",
  },
};

(async () => {
  // this works fine
  var res = await axios.get("https://api.intercom.io/contacts", basicAuth);
  console.log(res.data);

  // this fails as not_found
  var res = await axios.post(
    "https://api.intercom.io/contacts/search",
    { query: { field: "deleted", operator: "=", value: "true" } },
    basicAuth
  );
})();