Enable PIN code to automatically lock the app even if you are logged in under your account:
- Go to Profile Screen and tap the ⚙️ Settings button.
- Go to PIN and Fingerprint.
- Enable PIN. Set up a 4-digit PIN code that you will need to enter when the app is locked.
You may want to customize time interval after which the app is automatically locked and the PIN is prompted. You can also enable a Fingerprint access which will help you unlock the app using your fingerprint without entering your PIN.