anyways two days or so after onboarding him to mobile, he called me at his desk and asked me why the app wasn't running on his machine/phone. after looking at the error message i told him to change the path to certain settings to match his username/computer name. those were hardcoded to my computer/username. he breathed a sigh of relief after fixing it and told me about environment variables (how you can dynamically get the username so it's not tied to me), the engineer who was sitting next to him who heard the whole conversation laughed at my face. this guy was more mature about it and helped me understand it.