old_contents: class DefaultConfig(object):
      SECRET_KEY = '%^!@@*!&$8xdfdirunb52438#(&^874@#^&*($@*(@&^@)(&*)Y_)((+'
      DEBUG = False
      SQLALCHEMY_DATABASE_URI = 'sqlite://'
  
  
  class DevelopmentConfig(DefaultConfig):
      DEBUG = True
      SQLALCHEMY_DATABASE_URI = 'sqlite:///D:\\WORK\\marketing_notifications.db'
  
  
  class TestConfig(DefaultConfig):
      PRESERVE_CONTEXT_ON_EXCEPTION = False
      DEBUG = True
      TESTING = True
      WTF_CSRF_ENABLED = False
  
  
  config_env_files = {
      'test': 'marketing_notifications_python.config.TestConfig',
      'development': 'marketing_notifications_python.config.DevelopmentConfig',
  }
  
new_contents: class DefaultConfig(object):
      SECRET_KEY = '%^!@@*!&$8xdfdirunb52438#(&^874@#^&*($@*(@&^@)(&*)Y_)((+'
      DEBUG = False
      SQLALCHEMY_DATABASE_URI = 'sqlite://'
  
  
  class DevelopmentConfig(DefaultConfig):
      DEBUG = True
      SQLALCHEMY_DATABASE_URI = 'sqlite:///D:\\WORK\\marketing_notifications.db'
  
      TWILIO_ACCOUNT_SID = 'your_twilio_account_sid'
      TWILIO_AUTH_TOKEN = 'your_twilio_auth_token'
      TWILIO_NUMBER = 'your_twilio_phone_number'
  
  
  class TestConfig(DefaultConfig):
      PRESERVE_CONTEXT_ON_EXCEPTION = False
      DEBUG = True
      TESTING = True
      WTF_CSRF_ENABLED = False
  
  
  config_env_files = {
      'test': 'marketing_notifications_python.config.TestConfig',
      'development': 'marketing_notifications_python.config.DevelopmentConfig',
  }
  
subject: Add Twilio related configurations