Firebase

PHP used for the demo

Step 1 - Create project

https://www.console.firebase.google.com/www.console.firebase.google.com

Step 2 - Name project

Step 3 - Analytics(option)

Step 4 - Configure Google Analytics

Step 5 - Waiting until ready

Step 6 - Enable Email register & login

Step 7 - Enable realtime database

Select your region

Step 8 - Copy Database link

Method 1 - just only one database

Go to overlay widget

Method 2 - have multiply realtime database

insert databse link

Method 3 - have multiply realtime database with other special key

Fetch Type recommand - Patch