Open your device Settings
Tap Google
Tap Manage your Google Account
Go to the Security tab
Tap Password Manager
Tap Google Smart Lock
Turn off Smart Lock for Passwords
On Android, open Settings
Tap Google
Tap Smart Lock
Turn off Smart Lock for passwords
On Chrome, open Settings
Tap Autofill and passwords
Tap Google Password Manager
Turn off password saving and auto sign-in
Remove trusted devices and trusted places if needed
Restart your device if the changes do not take effect