title: Calling a Cloud Function from Android through Firebase
body: <h2>Situation</h2>
  <p>I have created a Google Cloud Function through <code>functions.https.onRequest</code>, which is working nicely when I paste its URL in a browser and integrates well with my Firebase setup. This function is meant as somewhat of an API method exposed from the backend, which I'd like to invoke from clients. In this particular instance, the client is an Android app.</p>
  <h2>Question</h2>
  <p>Is there any way I can perform the HTTP request for the Cloud Function by invoking it through Firebase? Or will I have to still perform a manual HTTP request?</p>