wpyb

To prevent that usernames are publically visible, the username in the author’s permalink is replaced with the author’s ID. 
In case the page is invoked with the default permalink structure, it is displayed “Page not found”.
Additionally it is possible to modify the author base. It is recommended to make use of this plugin to change it, but it also works with other plugins that have the functionality to customize the author base.

Change Author Link Structure

To prevent that usernames are publically visible, the username in the author's permalink is replaced with the author's ID.

mrdl

Adds the current logged in user ID to a specified string
<pre><code>[user_link url="https://domain.com/link"]A link[/user_link]
</code></pre>
Will output the following HTML
<pre><code><a href="https://domain.com/link?user_id=1">A link<a/>
</code></pre>

Append User ID

A plugin which adds some shortcode to append the current user ID to a link (href).

Change Author Link Structure vs Append User ID