Cloud Functions (gen 1) not able to connect to Cloud SQL (Postgres) + List of CF not loading

[Magg]

For some reason and seemingly out of the blue our Clouf Functions are not able to connect to the Cloud SQL database.

Getting this in the logs:
```
Cloud SQL connection failed. Please see https://cloud.google.com/sql/docs/mysql/connect-functions for additional details: googleapi: got HTTP response code 429 with body: [lots of html] We're sorry...... but your computer or network may be sending automated queries. To protect our users, we can't process your request right now.
```

And loads of 
```
Error: connect ECONNREFUSED /cloudsql/<PROJECT>:us-central1:apiv6/.s.PGSQL.5432
```

When trying to debug, the list of gen1 functions doesn't even load when accessed at https://console.cloud.google.com/functions/list

I've checked the database itself and it's fine. Not loaded and very few connections.

Anyone else seeing the same?