Retrieve a list of the collection URLs for all collections
        hosted on the server.

        :rtype: List
        :returns: a List of tuples of (name, url) for each collection

def get_collections(self):
        """Retrieve a list of the collection URLs for all collections
        hosted on the server.

        :rtype: List
        :returns: a List of tuples of (name, url) for each collection
        """
        result = self.api_request('/catalog')

        # get the collection name from the url
        return [(os.path.split(x)[1], x) for x in result['collections']]