Use author full name

authors.json

+{
+  "nik": {
+    "display_name": "Dominik George"
+  }
+}

templates/blog/post.html

@@ -27,7 +27,8 @@
               </figure>
             </div>
             <div class="media-content">
-              <p class="title is-4">{{ page.authors.0 }}</p>
+              {% set authors_data = load_data(path="authors.json") -%}
+              <p class="title is-4">{{ authors_data[page.authors.0].display_name }}</p>
               <p class="subtitle is-6">{{ page.authors.0 }}</p>
             </div>
           </div>