Verifying devices connected to the T-Mobile Internet Gateway

If nobody has paid attention. If you have T-Mobile WiFi home internet mobile gateway and have registered an account if you go to someone else home and connect to their home gateway it will not only show your gateway but also shows the gateway you're currently connected to along with all their WiFi credentials and password. Even gives you the ability to edit these details and I dont understand how that's even possible. My cousin has WiFi with T-Mobile but when she connected to mine my device name and all my device info populated in her app giving her the ability to even change my WiFi password and view all that info as well. I am not sure if T-Mobile is aware of this and I even took a screenshot and spoke with someone in the chat about it and they are unable to tell me why this happens. This needs to be fixed asap. That means everyone who comes to my home and have T-Mobile app set up will automatically have access to all my devices info. Fix ASAP.  If you think I'm lying if you know anyone else with T-Mobile home internet and you already have the app set up. When you go to their house connect to their WiFi and check your T-Mobile app and watch and see how all that device info now will show in your T-Mobile app. This is a big security risk! Everyone who connects to my device should not have access to these details. I stumbled across this today when I connected to my cousin WiFi and happened to open my app up to check something on my account and it now shows both our devices in my app and her details to the account also.  Yall better fix this now or I'm going with a different carrier!!!!!!