Better practice ? Api Calls to confluence

[Kai Krause]

Hi, 
i want to get of all permissions from all spaces from confluence.  

first i call all spaces with 

{base_url}/wiki/api/v2/spaces ,

then i get for every space the permission via 

{base_url}/wiki/api/v2/spaces/{space_id}/permissions

and then for every group or user the name via 

{base_url}/wiki/rest/api/user or 

{base_url}/wiki/rest/api/group/by-id

That are many apicalls to do that , I think i didnt see the simple solution to get the names from one earlyer call. So i cant save the time to call the naming apis. 

any ideas ? 

BR
Kai