code: def _get_aws_credentials():
      
  
      if (not 'AWS_ACCESS_KEY_ID' in _os.environ):
          raise KeyError('No access key found. Please set the environment variable AWS_ACCESS_KEY_ID.')
      if (not 'AWS_SECRET_ACCESS_KEY' in _os.environ):
          raise KeyError('No secret key found. Please set the environment variable AWS_SECRET_ACCESS_KEY.')
      return (_os.environ['AWS_ACCESS_KEY_ID'], _os.environ['AWS_SECRET_ACCESS_KEY'])
docs: Returns the values stored in the AWS credential environment variables.
      Returns the value stored in the AWS_ACCESS_KEY_ID environment variable and
      the value stored in the AWS_SECRET_ACCESS_KEY environment variable.
  
      Returns
      -------
      out : tuple [string]
          The first string of the tuple is the value of the AWS_ACCESS_KEY_ID
          environment variable. The second string of the tuple is the value of the
          AWS_SECRET_ACCESS_KEY environment variable.
  
      Examples
      --------
      >>> turicreate.aws.get_credentials()
      ('RBZH792CTQPP7T435BGQ', '7x2hMqplWsLpU/qQCN6xAPKcmWo46TlPJXYTvKcv')