title: Heroku doesn't recognize DATABASE_URL
body: <p>I've deployed my site to heroku and now I'm trying to push my local database up but keep getting this error:</p>
  <blockquote>
  <p>▸ Unknown database:</p>
  <p>▸  <em>my_database_url</em></p>
  <p>▸  Valid options are: DATABASE_URL</p>
  </blockquote>
  <p>After using the command:</p>
  <blockquote>
  <p>heroku pg:push postgres://user@localhost:5432/<em>app_name</em><br />
  <em>heroku_database_url</em>    --app   <em>heroku_app_name</em></p>
  </blockquote>
  <p>But the DATABASE_URL I'm using is the one that I've gotten from heroku with</p>
  <blockquote>
  <p>heroku config:get DATABASE_URL</p>
  </blockquote>
  <p>and using the returned value. I tried reseting the DATABASE_URL but I still get the same error. Any help would be appreciated, thanks!</p>