Glassroom uses a flexible structure to authenticate users and store their profiles. It's recommended to understand the Glassroom database structure before selecting a solution.

There are three major solutions for database connectivity in Glassroom 

1. Using Glassroom user registration system

If you have not any existing user registration system and user database, you can make a database and connect it to Glassroom. Glassroom enables you to register users and maintain them.

2. Using your own pre-installed user registration system through table manipulation

In this case you can fit your existing user database into your chat server. Glassroom is a flexible system and has  lots of features that enables you to connect it to almost any user registration database system.

3. Using your own special pre-installed user registration system through embedding your own classes in Glassroom system.

 If you need special features in your registration system like password encryption, login time scheduling, etc.