old_contents: __version__ = '0.0.1'
  
  from .middlewares import toolbar_middleware_factory
  from .main import setup
  
  __all__ = ['setup', 'toolbar_middleware_factory']
  
new_contents: __version__ = '0.0.1'
  
  from .middlewares import toolbar_middleware_factory
  from .main import setup, APP_KEY
  
  __all__ = ['setup', 'toolbar_middleware_factory', 'APP_KEY']
  
subject: fix import and tests