How to send HTTP POST request to Firebase
<p>How can I send a simple post request to Firebase RealtimeDatabase? Currently Database secrets are deprecated. 
I am using Vapor + Swift on server, Firebase SDK requires Node JS or Java.</p>

<p>This method is deprectate.
<code>curl 'https://docs-examples.firebaseio.com/rest/saving-data/auth-example.json?auth=CREDENTIAL'</code></p>