title: access environment variable in React-Native AndroidManifest.xml
body: <p>I'm new to React Native. The task at hand is to set my Google API key in AndroidManifest.xml without exposing it, when pushed to GitHub.
  I set up <strong>an environment variable</strong> called API_KEY, but however I want to <strong>access it in the .xml</strong>, I get an error when trying to spin up the dev server.</p>
  
  <p>So far I tried:</p>
  
  <pre><code>android:value=${env.API_KEY}
  android:value="${env.API_KEY}"
  android:value="${API_KEY}"
  </code></pre>
  
  <p>Thank you!</p>