Before you jump to the beta, make sure you track down all of your login information. Having it ready will make the transition go a lot smoother.
First of all you'll need your Apple ID to get started with the installation process so track down your info (or the info of the person you're installing for) before you attempt to install it. If you don't have this information you won't be able to proceed.
Once you get iOS 13 beta on board your device, there's a chance you'll get logged out of some of your apps and services. We've been logged out of first-party and third-party applications in the past.
If you haven't had to login to your accounts in awhile, you may have forgotten your login info. If you use a ton of apps on your device, tracking down this information could be extremely annoying. This is especially true if you rely on these apps and services to get through the day.
This is probably the last thing you want to be dealing with during an important day or work or school so make sure you track everything down ahead of time if you need to.