old_contents: from django.contrib import admin
  from certificates import models
  
  admin.site.register(models.Certificate)
  admin.site.register(models.CertificateTemplate)
  
new_contents: from django.contrib import admin
  from certificates.models import Certificate, CertificateTemplate
  
  class CertificateAdmin(admin.ModelAdmin):
      list_display = ( 'student_name', 'course_name', 'tutor_name', )
  
  admin.site.register(Certificate, CertificateAdmin)
  admin.site.register(CertificateTemplate)
  
subject: add in tutor name to certificate list display