Koray Gocmen Jinghan Guan
- Start the server "./server 4430"
- Start the client "./client"
- Login with a user "/login user_a 12345 127.0.0.1 4430"
- Create a session "/createsession test"
- Join the session "/joinsession test"
- Another user joins "/login user_b 67890 127.0.0.1 4430"
- Invite user to your session "/invite b"
- Messaging to the session "this is a message"
- Leave session "/leavesession"
- Exit the user "/exit"
- A user can only join to one session
- You can only invite other users to your session
- Server can only handle 10 online users at the same time