All top-level API resources support bulk fetch via the "list" API methods. For instance, you can list tenants, resources, and available backup policies. These list API methods share a common structure, taking at least two parameters - limit and page_token and returning next_page_token.
limit parameter defines how many objects to be returned per single API call. Note, the specific number of objects returned may differ from the requested number and can be smaller than requested. Also in some cases limit parameter can be ignored altogether, usually when the inappropriate limit value is passed (e.g. limit = 0). One should never assume that all the objects have been listed until next_page_token value returned by request is empty.
page_token parameter defines a starting point in listing and allows to continue listing from the last returned object by a previous API call identified by next_page_token response value.