text: import os
  import boto3
  
  from ask_sdk_core.skill_builder import CustomSkillBuilder
  from ask_sdk_dynamodb.adapter import DynamoDbAdapter
  
  def get_db_adapter():
      ddb_region = os.environ.get('DYNAMODB_PERSISTENCE_REGION')
      ddb_table_name = os.environ.get('DYNAMODB_PERSISTENCE_TABLE_NAME')
      
      ddb_resource = boto3.resource('dynamodb', region_name=ddb_region)
      return DynamoDbAdapter(table_name=ddb_table_name, create_table=False, dynamodb_resource=ddb_resource)