Add a property to Session to signify invalidated (op 9) sessions
Add a property to Session to signify invalidated (op 9) sessions

megumisonoda/discordrb,Roughsketch/discordrb,meew0/discordrb,meew0/discordrb,VxJasonxV/discordrb,VxJasonxV/discordrb,Roughsketch/discordrb,megumisonoda/discordrb