const apiKey = "51BNlRsLYKQxSu1q1UQq7F63j"

function getCourses() {
  let page = 0
  while (page >= 0) {
    page++
    Logger.log(page)
    var apiURL = 'https://api.northpass.com/v2/courses?limit=100&page='+page;
    const settings = {
    async: true,
    crossDomain: true,
    method: 'GET',
    headers: {
      accept: 'application/json',
      'X-Api-Key': apiKey
    }
  };
    const sendMsg = UrlFetchApp.fetch(apiURL, settings);
    var txtResponse = sendMsg.getContentText();
    var parseProps = JSON.parse(txtResponse);
    
    if (parseProps["links"]["next"] == null) {
      break;
    }
  }
}