Obtaining Firebase Cloud Messaging credentials - emartech/android-emarsys-sdk GitHub Wiki
Step 1: Log in
Log in to your developer account at the Firebase Console.
Step 2: Create project
If you already have a project, proceed to Step 3. If you do not have a project, click Add project.
Fill in the fields with the appropriate information, and then click Create Project.
Step 3: Find credentials
In the Project Settings, locate the Cloud Messaging tab.
Copy the Server key token to your clipboard.
Step 4: Add the tokens to your app in Mobile Engage
In Mobile Engage, locate the Apps tab and click Edit by the required app.
In the Platforms section, click Edit again to enter the Android Platform settings.
In the window displayed, add the Server key to the Google Cloud Messaging API key field and click Confirm.