Best way to show password in case of Unshowing password field?

I'm developing a Desktop JavaFX application using ControlFX. I have a problem that CustomPasswordField can not show password text instead of points (PasswordField limitation ), it needs some custom implementation. I'm looking for the way to show the password.

This is the password field form : enter image description here

What should I use to show password text (Label, PopOver) and where is the best place to put it ?

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