This one takes about ninety seconds to check on your own project, and I'd genuinely encourage you to stop reading and go do it before finishing this post, because if you have this bug, it's live in production right now, not a theoretical risk. Open your deployed site. Open dev tools.
Source: [Dev.to](https://dev.to/anas_sheikh_2/check-your-nextjs-client-bundle-right-now-your-api-keys-might-already-be-there-39i0)