postgres: cloudctl postgres connectionstring shows current password

[FrankEppink]

Currently cloudctl postgres connectionstring ... seems to show only the initial passwords.
When these are changed e.g. via ALTER USER <user-name> WITH PASSWORD <password> the change is NOT reflected in the output of cloudctl postgres connectionstring ....

This severely limits the usability of cloudctl postgres connectionstring ...

Alternatively provide a way via cloudctl postgres ... to change the password, so that a following cloudctl postgres connectionstring ... shows the new password.