- Open the https://firebase.google.com
- Create an account and click Go to console or create a new project form home page (note: you should have to be created to get the server key or for other settinfgs)
- After crreating a new project open it
- After open the project, click settings icon in the top right
- Click on project settings
- In the tab section, click CLOUD MESSGING tab
- Now, you can see there server key, sender ID etc. you can use it later on messging.