registering a model with the admin site, Once I try to define the entry Model system shows unproperly configured exception
Error has nothing to do with your model or admin site. You are running your Django Program  with a settings file that doesn't have a SECRET_KEY
(ll_env) C:\learning_log>python manage.py test  Traceback (most recent call last):   File "manage.py", line 21, in 
      main()   File "manage.py", line 17, in main
      execute_from_command_line(sys.argv)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management__init__.py",
  line 381, in execute_from_command_line
      utility.execute()   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management__init__.py",
  line 375, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\commands\test.py",
  line 23, in run_from_argv
      super().run_from_argv(argv)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\base.py",
  line 315, in run_from_argv
      parser = self.create_parser(argv[0], argv[1])   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\base.py",
  line 289, in create_parser
      self.add_arguments(parser)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\commands\test.py",
  line 44, in add_arguments
      test_runner_class = get_runner(settings, self.test_runner)   File
  "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\test\utils.py",
  line 303, in get_runner
      test_runner_class = test_runner_class or settings.TEST_RUNNER   File
  "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\conf__init__.py",
  line 79, in getattr
      self._setup(name)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\conf__init__.py",
  line 66, in _setup
      self._wrapped = Settings(settings_module)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\conf__init__.py",
  line 157, in init
      mod = importlib.import_module(self.SETTINGS_MODULE)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\importlib__init__.py",
  line 127, in import_module
      return _bootstrap._gcd_import(name[level:], package, level)   File "", line 1006, in _gcd_import
  File "", line 983, in _find_and_load
  File "", line 967, in
  _find_and_load_unlocked   File "", line 677, in _load_unlocked   File "", line 728, in exec_module   File
  "", line 219, in
  _call_with_frames_removed   File "C:\learning_log\learning_log\settings.py", line 16, in 
      django.setup()   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django__init__.py",
  line 19, in setup
      configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)   File
  "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\conf__init__.py",
  line 79, in getattr
      self._setup(name)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\conf__init__.py",
  line 66, in _setup
      self._wrapped = Settings(settings_module)   File "C:\Users\Allen\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\conf__init__.py",
  line 176, in init
      raise ImproperlyConfigured("The SECRET_KEY setting must not be empty.")django.core.exceptions.ImproperlyConfigured: The SECRET_KEY
  setting must not be empty.