If I log into the Xiaomi Auto APP with an account that has 'vehicle usage rights' and perform remote unlocking, will the vehicle head unit automatically log into this account?
No. After using the Xiaomi Auto APP for remote unlocking, to protect user privacy, if there is no valid key connected when opening the door and getting into the car, the current head unit account will be logged out.
Note that a valid key must meet two conditions:
1. The key is the Bluetooth key from the owner's or authorized person's mobile phone, or a remote control key bound to the corresponding account.
2. The corresponding account has been scanned and logged in once on the head unit.
If a valid key is connected, the head unit will automatically log into the corresponding account.