¿Cómo añadir un botón de mensaje al lado del nombre de perfil en las publicaciones?

Hello,
Is there a way to add message button next to user’s name on the posts, please see the screenshot below.

Just wanted to update with few additional requirements

  1. Show Message button next to profile name on all posts all the time even to guests

  2. When guests click on the Message button prompt them to log in

  3. When logged in users click on this Message button prompt them to subscribe (paid subscription) if they are not subscribed.

Sounds like this is doable with a custom theme component.
You can try developing that yourself (there is a Theme Developer Tutorial: 1. Introduction) or ask in Marketplace

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That’s what I also though. I’m going to check it out.

Beyond my capabilities. I found a plugin doing that but that doesn’t work.