guide:handle session regester time

tower:https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/4c5e97a8a64a4e35a47d5e7f6698d6f7/
Change-Id: Ie00a46c0d3d96c40b57c2018b9c44e547afc7c1a