Remove more useless stuff

Signed-off-by: Suki <suki@missallsunday.com>
Add the session

Signed-off-by: Suki <suki@missallsunday.com>
Show an error message

Signed-off-by: Suki <suki@missallsunday.com>
No need for a cat table

Signed-off-by: Suki <suki@missallsunday.com>