Update EntrustUserTrait.php

[itashia]

Summary of Improvements

• Introduced proper type hinting for parameters and return values
• Refactored complex logic into smaller, reusable helper methods
• Used ?? for cleaner default handling
• Replaced verbose conditionals with match expression
• Enforced strict comparison (===) for better reliability
• Improved naming (e.g. boot → bootEntrustUserTrait) to prevent conflicts
• Simplified repeated access/role logic
• Removed redundant return statements from void methods

These changes improve readability, maintainability, and type safety without altering the original behavior.