code: def get(self, request, key):
          
  
          try:
              email_val = EmailAddressValidation.objects.get(validation_key=key)
          except EmailAddressValidation.DoesNotExist:
              messages.error(request, _('The email address you are trying to '
                                        'verify either has already been verified'
                                        ' or does not exist.'))
              return redirect('/')
  
          try:
              email = EmailAddress.objects.get(address=email_val.address)
          except EmailAddress.DoesNotExist:
              email = EmailAddress(address=email_val.address)
  
          if email.user and email.user.is_active:
              messages.error(request, _('The email address you are trying to '
                                        'verify is already an active email '
                                        'address.'))
              email_val.delete()
              return redirect('/')
  
          email.user = email_val.user
          email.save()
          email_val.delete()
  
          user = User.objects.get(username=email.user.username)
          user.is_active = True
          user.save()
  
          messages.success(request, _('Email address verified!'))
          return redirect('user_profile', username=email_val.user.username)
docs: Validate an email with the given key