const connection = await nango.getConnection();
let credentials: { cid?: string; provhash?: string } = {};
if ('username' in connection.credentials && 'password' in connection.credentials) {
  credentials = {
    cid: connection.credentials.username,
    provhash: connection.credentials.password,
  };
} else {
  throw new nango.ActionError({
    message: `Basic API credentials are incomplete`
  });
}
const postData = {
  cid: credentials.cid,
  provhash: credentials.provhash,
  cmd: "batchadd",
  "data": [
    {
      "username": "user4@lastpass.com",
      "fullname": "Jane Smith",
      "password": "DefaultPassword",
      "password_reset_required": false
    }
  ]
};

const resp = await nango.post({
  data: postData,
});