How Long Is the Lifecycle of a Room on SparkRTC?

The following situations may occur:

• The first user who joins a room is the owner of the room, but the user cannot dismiss the room.
• When all users leave a room, the background immediately dismisses the room.
• If one user in a room is disconnected, the user will be removed from the room after the keepalive time expires. If all users in a room are disconnected, the room will be automatically dismissed after the keepalive time expires.
• If the room that a user wants to join does not exist, the background automatically creates a room.