code: def logout(request):
      '''
      Logs out the user. returns an error if the user is not
      authenticated.
      '''
      user = request.user
      serializer = LogoutSerializer(data=request.data)
      serializer.is_valid(raise_exception=True)
      data = serializer.validated_data
  
      if should_authenticate_session():
          auth.logout(request)
      if should_retrieve_token() and data['revoke_token']:
          try:
              user.auth_token.delete()
          except Token.DoesNotExist:
              raise BadRequest('Cannot remove non-existent token')
  
      return get_ok_response('Logout successful'f logout(request):
      '''
      Logs out the user. returns an error if the user is not
      authenticated.
      '''
      user = request.user
      serializer = LogoutSerializer(data=request.data)
      serializer.is_valid(raise_exception=True)
      data = serializer.validated_data
  
      if should_authenticate_session():
          auth.logout(request)
      if should_retrieve_token() and data['revoke_token']:
          try:
              user.auth_token.delete()
          except Token.DoesNotExist:
              raise BadRequest('Cannot remove non-existent token')
  
      return get_ok_response('Logout successful')
docs: Logs out the user. returns an error if the user is not
      authenticated.