Can I leave my API key in my Flutter code?

I know this is not recommended, but I'm thinking it should be fully secure right? Because the code is compiled to binary anyway when it is made into an .apk and my github repo is private. So surely there's no security issues?


It's a Google Maps API key meaning people could charge me for their calls if they got hold of it

api apk binary code cybersecurity flutter github google google maps key maps people private repo security security issues thinking