text: import os
  
  class Config:
      SECRET_KEY = os.environ.get('SECRET_KEY')
  
  class DevelopmentConfig(Config):
      DEBUG = True
      SECRET_KEY = os.environ.get('SECRET_KEY') or 't0p s3cr3t'
  
  class TestingConfig(Config):
      TESTING = True
  
  class ProductionConfig(Config):
      pass
  
  config = {
  'development': DevelopmentConfig,
  'testing': TestingConfig,
  'production': ProductionConfig,
  'default': DevelopmentConfig
  }
  