old_contents: // Usage
  // author=$(node ./getSlackUser.js)
  // or
  // author=$(curl –silent -L 'https://raw.githubusercontent.com/debitoor/teamcity-merge/master/getSlackUser.js' | node)
  
  const { execSync } = require('child_process');
  const assert = require('assert');
  
  assert(process.env.SLACK_TOKEN, 'process.env.SLACK_TOKEN should be specified');
  
  //Map of emails -> slack user name
  const emailsMap = {
  	'anton.mamant@gmail.com': 'mamant',
  	'mpush@inbox.ru': 'mpushkin',
  	'jp@jonatanpedersen.com': 'jonatanpedersen',
  	'kollner@gmail.com': 'kollner',
  	'hiller@live.dk': 'hilleer',
  	'alexeymalyarov@gmail.com': 'lex',
  	'mfbeast@mail.ru': 'mpushkin',
  	'niklasgundlev@gmail.com': 'niklas',
  	'dgulkovskiy@gmail.com': 'dima',
  	'zygimantas.butas@gmail.com': 'zygi',
  	'stepan.te.ua@gmail.com': 'stepan',
  	'arelstone@gmail.com': 'cd',
  	'rasmusknap@gmail.com' : 'rasmus',
  	'bgeraymovich@gmail.com' : 'bogdan407',
  	'denisetan@live.nl': 'denise',
  	'hleote@gmail.com': 'Hugo'
  };
  
  const email = execSync('git log --pretty=format:\'%ae\' -n 1', {encoding: 'utf-8'});
  if (email === 'debitoor-bot@debitoor.com') {
  	console.log('TeamCity');
  	process.exit(0);
  }
  const usersJSON = execSync(`curl -X POST "https://slack.com/api/users.list?token=${process.env.SLACK_TOKEN}" -s`);
  const users = JSON.parse(usersJSON);
  const slackUser = emailsMap[email];
  
  const user = users.members.find((m) =>
  	m.name === slackUser || m.profile.email === email
  );
  if(!user) {
  	console.log(`${slackUser}|${email} (could not find this slack-username or email in slack?! Fix it here: https://github.com/debitoor/teamcity-merge/blob/master/getSlackUser.js)`);
  	process.exit(0);
  }
  console.log(`<@${user.id}>`);
  
new_contents: // Usage
  // author=$(node ./getSlackUser.js)
  // or
  // author=$(curl –silent -L 'https://raw.githubusercontent.com/debitoor/teamcity-merge/master/getSlackUser.js' | node)
  
  const { execSync } = require('child_process');
  const assert = require('assert');
  
  assert(process.env.SLACK_TOKEN, 'process.env.SLACK_TOKEN should be specified');
  
  //Map of emails -> slack user name
  const emailsMap = {
  	'anton.mamant@gmail.com': 'mamant',
  	'mpush@inbox.ru': 'mpushkin',
  	'jp@jonatanpedersen.com': 'jonatanpedersen',
  	'kollner@gmail.com': 'kollner',
  	'hiller@live.dk': 'hilleer',
  	'alexeymalyarov@gmail.com': 'lex',
  	'mfbeast@mail.ru': 'mpushkin',
  	'niklasgundlev@gmail.com': 'niklas',
  	'dgulkovskiy@gmail.com': 'dima',
  	'zygimantas.butas@gmail.com': 'zygi',
  	'stepan.te.ua@gmail.com': 'stepan',
  	'arelstone@gmail.com': 'cd',
  	'rasmusknap@gmail.com' : 'rasmus',
  	'bgeraymovich@gmail.com' : 'bogdan407',
  	'denisetan@live.nl': 'denise',
  	'hleote@gmail.com': 'hugo'
  };
  
  const email = execSync('git log --pretty=format:\'%ae\' -n 1', {encoding: 'utf-8'});
  if (email === 'debitoor-bot@debitoor.com') {
  	console.log('TeamCity');
  	process.exit(0);
  }
  const usersJSON = execSync(`curl -X POST "https://slack.com/api/users.list?token=${process.env.SLACK_TOKEN}" -s`);
  const users = JSON.parse(usersJSON);
  const slackUser = emailsMap[email];
  
  const user = users.members.find((m) =>
  	m.name === slackUser || m.profile.email === email
  );
  if(!user) {
  	console.log(`${slackUser}|${email} (could not find this slack-username or email in slack?! Fix it here: https://github.com/debitoor/teamcity-merge/blob/master/getSlackUser.js)`);
  	process.exit(0);
  }
  console.log(`<@${user.id}>`);
  
subject: Update getSlackUser.js