Zoho API v2.0 - get ALL users from ALL projects

Zoho API v2.0 - get ALL users from ALL projects

Hello, 

      I've been trying to work on an automatization project lately and I find it difficult to work with this strict structure. To be more explicit, if i would like to get all users participating in a project i would need to get all projects first.
      Same thing with projects. If i want to get all projects, I would need to get all portals first. 
      The problem with this aproach is that it consumes a lot of time and resources. 
    
      I want to ask if there is another way of getting all users, all projects, etc. directly rather than the method explained above. 

Ty