Hi abracadabra team!

I have following questions:

1. I wont to use following API calls(from this documentation https://www.abracadabra-recommender.com/docs/improve-your-recommender-model):
   /get/subjects </br>
   /get/users </br>
   /get/subject </br>
   /get/user </br>
   /delete/subject </br>
   /delete/user </br>
   How I can use that methods?
2. In your system works only “Content-based filtering” for getting results. I wont to use “Collaborative filtering” but API gives response message
   "Sorry we are updating the collaborative filtering recommender. Please use ‘hybrid’ or ‘content’ instead. Expected ETA for ‘social’: end of May 2017".
   When the “Collaborative filtering” will implement?
3. I want to get recommendation list with 10 elements but API gives all data. How can I get it?