How do multi-users authorize SMS in vivo?

Vivo multi-user authorization SMS steps are as follows.

1.vivo mobile phone find settings and click enter, then find system management, and select enter to see multi-users.

2. After adding users or visitors, it should be noted that when using the multi-user function to add sub-users, the multi-user icon will be displayed in the lock screen interface, and the currently displayed icon represents your current system. Click the icon to switch owners/users/visitors at will.