text: import os 
  
  class Config:
      DEBUG = False
      DEVELOPMENT = False
      CSRF_ENABLED = True
      SECRET_KEY = os.environ.get("SECRET_KEY")
      SQLALCHEMY_DATABASE_URI = os.environ.get("SQLALCHEMY_DATABASE_URI")
      SQLALCHEMY_TRACK_MODIFICATIONS = False
      JSON_SORT_KEYS=False
      
  
  class ProductionConfig(Config):
      DEBUG = False
  
  
  class StagingConfig(Config):
      DEBUG = True
      DEVELOPMENT = True
  
  
  class DevelopmentConfig(Config):
      DEBUG = True
      DEVELOPMENT = True
  
  class TestingConfig(Config):
      TESTING = True
      SQLALCHEMY_DATABASE_URI = os.environ.get("SQLALCHEMY_DATABASE_URI_TEST_DB")
  