Generate an API token
API tokens allow external systems to authenticate API requests.
User must log in first
API tokens can only be generated for users who have logged into the system at least once.
The user's email address must be registered with Firebase before a token can be issued.
Open users
Navigate to:
General Settings → Users
Open the user menu

Select Generate API token.
Copy the generated token

The token is copied to your clipboard.
This token is used to obtain a Firebase access token which can then be used for API authentication.
Related resources
Understand the concept