EnumerateCloudantDBUsers

var cloudantCreds = {
  username: 'cloudantusername',
  password: 'cloudantpassword'
};

var dbname = 'cloudantdbname';

var auth = 'Basic ' + new Buffer( cloudantCreds.username + ':' + cloudantCreds.password).toString('base64');

var options = {
  hostname: cloudantCreds.username  + '.cloudant.com',
  port: 443,
  path: '/' +  dbname + '/_security',
  method: 'GET',
  headers: {
      'Authorization' : auth,
      'Content-Type': 'application/json'
  }
};

var request=https.request(options, function(response) {
  response.setEncoding('utf8');
  response.on('data', function (chunk) {
      if (JSON.parse(chunk).ok === true) {
          console.log('Users for ' + dbname.toUpperCase() + 'successfully enumerated.');
          var users = JSON.parse(chunk).cloudant;
          for(var username in users) {
              if (users.hasOwnProperty(username)) {
                  if (users[username] == '_writer' && username !== '_reader') {
                      console.log('API Key user with _writer permissions: ' + username + ' found.');
                      var apikeyuser = username;
                  }
              }
          }
      } else {
          console.log("Failed to enumerate database users");
          console.log(JSON.parse(chunk).ok);
          console.log('Body: ' + chunk);
      }
  });
});
request.end();