old_contents: from django.contrib import admin
  from api.models.protocols import Protocol, ProtocolDataSource, \
      Organization, ProtocolUser, ProtocolUserCredentials, DataSource
  
  admin.site.register([
      Protocol, ProtocolDataSource, Organization, ProtocolUser,
      ProtocolUserCredentials, DataSource])
  
new_contents: from django.contrib import admin
  from api.models.protocols import Protocol, ProtocolDataSource, \
      Organization, ProtocolUser, ProtocolUserCredentials, DataSource, \
      ProtocolDataSourceLink
  
  
  from django.contrib import admin
  
  
  class OrganizationAdmin(admin.ModelAdmin):
      list_filter = ['name']
      search_fields = ['name']
      list_display = ['name', 'subject_id_label']
  
  admin.site.register(Organization, OrganizationAdmin)
  
  
  class DataSourceAdmin(admin.ModelAdmin):
      list_filter = ['created', 'modified']
      search_fields = ['name']
      list_display = ['name', 'description']
  
  admin.site.register(DataSource, DataSourceAdmin)
  
  
  class ProtocolUserCredentialsAdmin(admin.ModelAdmin):
      list_filter = ['protocol', 'user', 'data_source', 'created', 'modified']
      search_fields = ['user', 'data_source']
      list_display = ['protocol', 'data_source', 'user']
  
  admin.site.register(ProtocolUserCredentials, ProtocolUserCredentialsAdmin)
  
  
  class ProtocolAdmin(admin.ModelAdmin):
      list_filter = ['name', 'created', 'modified']
      list_display = ['name']
      search_fields = ['name']
  
  admin.site.register(Protocol, ProtocolAdmin)
  
  
  class ProtocolDataSourceAdmin(admin.ModelAdmin):
      list_filter = ['protocol', 'data_source', 'path', 'created', 'modified']
      list_display = ['protocol', 'data_source', 'path']
      search_fields = ['protocol', 'data_source', 'path']
  
  admin.site.register(ProtocolDataSource, ProtocolDataSourceAdmin)
  
  
  class ProtocolUserAdmin(admin.ModelAdmin):
      list_filter = ['user', 'protocol', 'created', 'modified']
      list_display = ['user', 'protocol']
      search_fields = ['user', 'protocol']
  
  admin.site.register(ProtocolUser, ProtocolUserAdmin)
  
  
  class ProtocolDataSourceLinkAdmin(admin.ModelAdmin):
      list_display = ['pds_one', 'pds_two']
  
  admin.site.register(ProtocolDataSourceLink, ProtocolDataSourceLinkAdmin)
  
subject: Add admin filters back