How do you go about connecting a mobile app and the web app just via 1 api endpoint (that's being checked for authenticated users) using Next? Is there any tutorial specifically (or including this among other things) on Youtube, Udemy or other website? Is it even possible just using Next and not something like Nest just for handling routes authentication? I have never seen a tutorial using Next 13 that would show connecting via web and mobile app at the same time. Please, if you know about it, let me know. The tech used to build the mobile app is not important, it could be (Ionic/Next, Ionic/React, RN, Flutter, Swift/Kotlin,...) but I would really prefer to use Next's native APIs for both web and mobile clients without the need for using Nest or FastAPI etc. on top of Next. Thank you in advance for any help/advice.