Hello, follow these steps:
- Go to profile page on messenger app.
- Go to Switch account (towards the bottom of the page). If you don’t see this option, update your app to the newest version.
- Add an account
- Enter the email/phone number and password associated with the account > OK
- Here you can chose Require password (each time you switch)
In your case, you want to remove this, so enter Don’t Require
- Tap continue as (name of account)
You should now be able to switch between accounts, without entering your password each time!
Let me know if it works!