Simplify Import Statement and Improve Test Coverage for secured Package

[Joaopeuko]

Description

This PR simplifies the import statement for the Secured class and adds unit tests to achieve almost 100% coverage for secured/secured.py.

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Related Issue

• Fixes Simplify Import Statement for Secured Class #18

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Changes Made

• Simplified the import statement for the Secured class from from secured.secured import Secured to from secured import Secured.
• Updated secured/__init__.py to include Secured in __all__ for a cleaner import.
• Added comprehensive unit tests for the Secured class.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.21%. Comparing base (0a096c7) to head (5433b49).

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Additional details and impacted files

@@             Coverage Diff             @@
##             main      #19       +/-   ##
===========================================
+ Coverage   77.60%   99.21%   +21.61%     
===========================================
  Files           4        5        +1     
  Lines         125      127        +2     
===========================================
+ Hits           97      126       +29     
+ Misses         28        1       -27     

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