def list_security_configurations(Marker=None):
    """
    Lists all the security configurations visible to this account, providing their creation dates and times, and their names. This call returns a maximum of 50 clusters per call, but returns a marker to track the paging of the cluster list across multiple ListSecurityConfigurations calls.
    See also: AWS API Documentation
    
    
    :example: response = client.list_security_configurations(
        Marker='string'
    )
    
    
    :type Marker: string
    :param Marker: The pagination token that indicates the set of results to retrieve.

    :rtype: dict
    :return: {
        'SecurityConfigurations': [
            {
                'Name': 'string',
                'CreationDateTime': datetime(2015, 1, 1)
            },
        ],
        'Marker': 'string'
    }
    
    
    """
    pass
