Step 1 : Go to Firebase.com
Step 2 : If you have a Firebase account, Sign in, else create an account
Step 3 : Click on Get Started 
Step 4 : Click on Create a Project
Step 5 : Enter Project name and tick mark the checkbox to accept Firebase terms.
Step 6 : Click on Continue
Step 7 : Select “Set up Google Analytics for my project” and click on Continue
Step 8 : Open Configure Google Analytics dropdown menu and tick mark the checkbox to accept both the terms and conditions.
Step 9 : Click on Create Project
Step 10 : Click on Continue
Step 11 : In Develop menu on the left hand side panel, click on Database 
Step 13 : Click on Enable
Step 14 : You will see Firebase url
Step 15 : Just copy first part of this URL, it is your Firebase APP ID (in my case it is “wcl-chat”)
