Add UnregisteredAuthor to admin in journals app

journals/admin.py

 from django.contrib import admin, messages
 
-from journals.models import Journal, Volume, Issue, Publication, Deposit
+from journals.models import UnregisteredAuthor, Journal, Volume, Issue, Publication, Deposit
 
 
 
+class UnregisteredAuthorAdmin(admin.ModelAdmin):
+    search_fields = ['last_name']
+    ordering = ['last_name']
+
+admin.site.register(UnregisteredAuthor, UnregisteredAuthorAdmin)
+
+
 class JournalAdmin(admin.ModelAdmin):
     search_fields = ['name']
     list_display = ['__str__', 'doi_string', 'active']