title: How do I view my environment variables?
body: <p>I am trying to connect to my pusher server but am receiving the error:</p>
  
  <blockquote>
    <p>Missing client configuration: please check that key, secret and app_id are configured.</p>
  </blockquote>
  
  <p>I want to check my environmental variables, but cannot find any clear way to do this on Stack Overflow yet. </p>