def get_vault_notifications(accountId=None, vaultName=None):
    """
    This operation retrieves the notification-configuration subresource of the specified vault.
    For information about setting a notification configuration on a vault, see  SetVaultNotifications . If a notification configuration for a vault is not set, the operation returns a 404 Not Found error. For more information about vault notifications, see Configuring Vault Notifications in Amazon Glacier .
    An AWS account has full permission to perform all operations (actions). However, AWS Identity and Access Management (IAM) users don't have any permissions by default. You must grant them explicit permission to perform specific actions. For more information, see Access Control Using AWS Identity and Access Management (IAM) .
    For conceptual information and underlying REST API, see Configuring Vault Notifications in Amazon Glacier and Get Vault Notification Configuration in the Amazon Glacier Developer Guide .
    See also: AWS API Documentation
    
    Examples
    The example retrieves the notification-configuration for the vault named my-vault.
    Expected Output:
    
    :example: response = client.get_vault_notifications(
        vaultName='string'
    )
    
    
    :type accountId: string
    :param accountId: The AccountId value is the AWS account ID of the account that owns the vault. You can either specify an AWS account ID or optionally a single '- ' (hyphen), in which case Amazon Glacier uses the AWS account ID associated with the credentials used to sign the request. If you use an account ID, do not include any hyphens ('-') in the ID.
            Note: this parameter is set to '-' bydefault if no value is not specified.
            

    :type vaultName: string
    :param vaultName: [REQUIRED]
            The name of the vault.
            

    :rtype: dict
    :return: {
        'vaultNotificationConfig': {
            'SNSTopic': 'string',
            'Events': [
                'string',
            ]
        }
    }
    
    
    :returns: 
    (string) --
    
    """
    pass
