Review the scope (private or public) of functions and variables.

[sergiomrebelo]

The purpose of this issue is to conduct a comprehensive review of the scope (private or public) of functions and variables within the project, particularly within the controllers scripts. While some methods have been appropriately transitioned to private, the scope of some public variables has not been thoroughly checked.

This is an enhancement task is crucial for maintaining code clarity, preventing unintended access, and promoting encapsulation. This task also includes the refactor of the system to using loadash to handle certain methods.