Fix user and poster not showing in vouchers

overlord/src/app/payment/payment.component.html

@@ -182,9 +182,9 @@
     <span class="flex">
       Created on&nbsp;<strong>{{ form.creationDate().value() | localTime }}</strong
       >&nbsp;and Last Edited on&nbsp; <strong>{{ form.lastEditDate().value() | localTime }}</strong
-      >&nbsp;by&nbsp; <strong>{{ form.userName() }}</strong
+      >&nbsp;by&nbsp;<strong>{{ form.userName().value().name }}</strong
       >.
-      {{ form.posted() ? 'Posted by ' + form.poster() : '' }}
+      {{ form.posted().value() ? 'Posted by ' + form.poster().value() : '' }}
     </span>
   }
 </div>

overlord/src/app/payment/payment.component.ts

@@ -65,7 +65,7 @@ export interface PaymentFormModel {
   posted: boolean;
   creationDate: string;
   lastEditDate: string;
-  userName: string;
+  userName: User;
   poster: string;
 }
 
@@ -153,7 +153,7 @@ export class PaymentComponent {
         posted: voucher.posted,
         creationDate: voucher.creationDate,
         lastEditDate: voucher.lastEditDate,
-        userName: voucher.user?.name ?? '',
+        userName: voucher.user ?? new User(),
         poster: voucher.poster ?? '',
       };
     },