function login(username, password, callback) {

  var request = require('request');

  // DEBUG ONLY
  console.log('@@@ login - start @@@');
  console.log('username: ' + username);
  console.log('password: ' + password);

  username = username || '';

   console.log('!!!@@@@@@@@');
   console.log(configuration.ENDPOINT_LOCAL);
    console.log('!!!@@@@@@@@');

  var body, IDP_ENDPOINT;
 // var emailformat = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
 // if (username.match(emailformat)) {
  // if (username.indexOf('@') >= 0) {
 if (/^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/.test(username)) {

    IDP_ENDPOINT = configuration.ENDPOINT_LOCAL + "/api/v1/loginByEmail";



    console.log('using email');

    body = {
      email: username,
      password: password
    };

  } else {

    // eg. {"account_number":"1234"}

    IDP_ENDPOINT = configuration.ENDPOINT_LOCAL + "/api/v1/loginByAccountNumber";

    var params, account_number;

    try {

      params = JSON.parse(username);
      account_number = params.account_number;

    } catch (e) {
      console.error(e);
      return callback('Unable to parse username: ' + username);
    }

    body = {
      account_number: account_number,
      password: password
    };

  }

  console.log(IDP_ENDPOINT);

  var options = {
    method: 'POST',
    url: IDP_ENDPOINT,
    headers: {
      'cache-control': 'no-cache',
      'content-type': 'application/json'
    },
    body: body,
    json: true
  };

  request(options, function (error, response, body) {
    if (error) {
      throw new Error(error);
    }
    console.log('@@@@@@@>>>>');
    console.log(body);
    console.log('@@@@@@@<<<<');
     if (response.statusCode != 200 && response.statusCode != 201) {
      return callback(new Error('Wrong Username / Password'));
    }
    console.log(body);
    var user = body;
    // var user = JSON.parse(body);
    console.log('@@@ login - end @@@');

    callback(null, {
      user_id: user.id.toString(),
      nickname: user.nickname,
      email: user.email,
      email_verified: user.email_verified == 'true',
     //email_verified: true,
      user_metadata: {
        //account_number: user.account_number,
         googleId: user.google_id
      }
    });

  });
}