WHAT: Start to support the new format of Server Keys
WHERE: Aerogear UPS
WHEN: When the user will add the Server Key and Sender ID to create variants and to send push notifications

Currently, the Aerogear is supporting just the legacy server key and this task is for it starts to support the server key(the new one). For further information check: https://stackoverflow.com/questions/41377108/what-is-the-difference-between-server-key-and-legacy-server-key-in-fcmfirebase