Add definitions for all Nordigen API calls

core/templates/partials/aggregator-info.html

@@ -25,7 +25,7 @@
       </td>
       <td>{{ item.created }}</td>
       <td>{{ item.institution_id }}</td>
-      <td>{{ item.accounts }}</td>
+      <td>{{ item.accounts|length }}</td>
       <td>
         <div class="buttons">
           <button