`Description:` The leader information of beacons is currently returning null when querying group details. This affects the accuracy of beacon details. <img width="1440" alt="Screenshot 2024-02-08 at 12 36 04" src="https://github.com/CCExtractor/beacon-backend/assets/113206442/d45dde9f-437c-49e4-89cb-550f8628c625"> `Steps to Reproduce:` Query group details. Check leader field within Beacon objects. Observe null values instead of expected leader details. `Expected Behavior:` leader field in Beacon objects should contain the respective user details in group queries.