I just implemented the new Cloud Functions for Firebase, but there something in the log that bothers me:
Billing account not configured. External network is not accessible and quotas are severily limited. Configure billing account to remove these restrictions
I actually managed to access the function from the external network, so I'm wondering do I really have to give my billing account? There's nothing about this in the firebase documentation.
I'm using the Spark subscription plan for personal test purposes and I don't want to add billing info if I'm not going to pay for anything yet.