title: Integrating stripe api
body: <p>I am trying to use stripe payment gateway for my android app. This is my first time using this so bear with me here. I am following <a href="https://stripe.com/docs/payments/integration-builder" rel="nofollow noreferrer">this documentation</a> from stripe and there is line a where I am suppose to put my backend url in a variable like this</p>
  <p><code>  private static final String BACKEND_URL = &quot;my backend url&quot;;</code></p>
  <p>I am using Firebase for my back end and so my question is what will I put for the url?</p>