Is the API key in the Rest API secure?

It would be great if there was a place to store the API keys securely inside WeWeb and request it like a variable.

It looks like I’m going to have to build (aka faff for many hours) a backend api proxy to handle the API request as there isn’t a secure way in WeWeb. As a nocode builder, this is quite a bit of code for me.

All I’d like to do is integrate OneSignal and have a email sign up form. Not so simple it seems.