Hello Fellow Developers,
I want to know how to make a custom server system, for example when a player clicks “Create Server”, a server creates for them and other players can join that server using a textbox to type their name and click “join player”.
I really hope that made sense, anyways Have a great day! 
To reserve/create a server:
To get a player’s server:
To move a player to a reserved server:
PseudoPerson
Edit: You also need to use the DataStoreService(recommended) or MessagingService to let other servers know about passcodes returned by ReserveServer and used when teleporting players with TeleportToPrivateServer.
This is amazing!
Thank you so much for the help! :]