Thanks for your post.
There is no general list of all TeamViewer IDs and passwords. But to make it easy for your to quickly connect to all your devices we recommend to work with the Computers & Contacts list in which you can save all devices with an alias and the password.
I hope the info helps you.
Since the list is saved online, you cannot really loose it.
You could of course share the different groups in your list list with a colleague to make sure that a second account has access to the remote devices.