async while loop

loop.js

function fetchUsersFromCognito (options) {
  const defaults = {
    UserPoolId: AWS_COGNITO_USER_POOL_ID
  };
  const params = Object.assign({}, defaults, options);

  return new Promise((resolve, reject) => {
    client.listUsers(params, (error, data) => {
      if (error) {
        reject(error);
      } else {
        resolve(data);
      }
    });
  });
}

async function getUserDataFromCognito (usersWithAccount) {
  let users = [];
  let getUsers = await fetchUsersFromCognito();

  while (getUsers) {
    const PaginationToken = getUsers.PaginationToken;
    users = [...users, ...getUsers.Users];

    if (PaginationToken) {
      getUsers = await fetchUsersFromCognito({ PaginationToken });
    } else {
      getUsers = null;
    }
  }
  
  return users;
}