old_contents: from apps.organizations.models import Organization, OrganizationAddress
  from django.contrib import admin
  
  
  class OrganizationAddressAdmin(admin.StackedInline):
      model = OrganizationAddress
      extra = 1
  
  
  class OrganizationAdmin(admin.ModelAdmin):
      inlines = (OrganizationAddressAdmin,)
  
  
  admin.site.register(Organization, OrganizationAdmin)
  
new_contents: from django.contrib import admin
  
  from apps.organizations.models import (
      Organization, OrganizationAddress, OrganizationMember
  )
  
  
  class OrganizationAddressAdmin(admin.StackedInline):
      model = OrganizationAddress
      extra = 1
  
  
  class OrganizationAdmin(admin.ModelAdmin):
      inlines = (OrganizationAddressAdmin,)
  
  
  admin.site.register(Organization, OrganizationAdmin)
  
  admin.site.register(OrganizationMember)
  
subject: Add Admin page for OrganizationMember.