Support › General › License Value not hidden
When you inspect the input element you can see the License, is this how it is suposed to work?
<input required="" class="regular-text" name="meta_box_updater[api_key]" value="XXXXXXXXXXX" type="password">
Thanks for your feedback. I've been thinking about this, too. Probably I'll replace the value with *** when the license is valid.
I think that would be best.