- Replaced JwtSecurityToken with JsonWebToken in DependencyInjection.cs to align with ASP.NET Core 8+ requirements.
- Enhanced CustomWebApplicationFactory to configure minimal JWT validation and custom authentication handling for functional tests.
- Removed outdated tests that relied on InMemory Database limitations, ensuring a cleaner test suite.
- Updated RegisterUserCommandHandlerTests to throw DuplicateResourceException for better error handling.