const { SiteClient } = require('datocms-client');
async function run() {
  const client = new SiteClient('YOUR-API-TOKEN');
  
  const siteInvitationId = '312';
  const siteInvitation = await client.siteInvitation.destroy(siteInvitationId);
  
  console.log(siteInvitation);
}
run();

> node example.js
{
  "id": "312",
  "email": "mark.smith@example.com",
  "role": "34"
}