After you deploy your application you will get a login page and it will ask you for a password.
You will need to install the Heroku cli (cli.heroku.com) to get the logs of your application. After you installed the Heroku cli you can run:
$ heroku logs --app <yourappname>
The password can be found on the logs. If you cant see it, then restart the dynos.
In this case the password would be:
MIT © Carlos Abraham