How do you create an author page?

Hi,
I would like to know how you can create an author's page showing:

• author's bio
• author's photo
• latest articles by this author

So far, I've added author: John Doe to the frontmatter and

{% if page.header.author %} 
<span class="author">{{ "AUTHOR"|t }}: {{ page.header.author }}</span>
{% endif %}

to
/public_html/user/themes/mytheme/templates/partials/blog_item.html.twig
so that the author name, if any, shows up in the blog post.

I'd like to add a <a href> to this part, like the pages that Grav creates for tags, but I don't know where to start.

Any help will be appreciated. TIA.