title: After deploying Laravel project in Heroku MySQL doesn`t work
body: <p>I have made my first Laravel project and tried to deploy it to the Heroku. It works, but when I tried to login or register it saying "SQLSTATE[HY000] [2002] Connection refused (SQL". 
  There is my site: <a href="http://rocky-river-97869.herokuapp.com/login" rel="nofollow noreferrer">http://rocky-river-97869.herokuapp.com/login</a> </p>
  
  <p><a href="https://i.stack.imgur.com/EPu91.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EPu91.png" alt="After login should look like this:"></a>
  Do I have connect PhpMyAdmin separately?
  Thank you for you help</p>