Display survey fields in User admin page

contest/admin.py

 from django.contrib import admin
 from .models import Frequency, Band, Reference, QSO, User, Contest, ShadowCall, EntryCategory
 
-admin.site.register(User)
+
+class UserAdmin(admin.ModelAdmin):
+    list_display = ('username', 'dncall', 'qrv2m', 'qrv70cm', 'extra2m70cm')
+admin.site.register(User, UserAdmin)
 admin.site.register(QSO)
 admin.site.register(Band)
 admin.site.register(Frequency)