Fix 'A closing curly bracket must not be preceded by a blank line.' issue in API.Boilerplate.Domain\Entities\Usuario.cs

[CodeFactor](https://www.codefactor.io/repository/github/devcomputaria/apiboilerplate/overview/main) found an issue: A closing curly bracket must not be preceded by a blank line.

It's currently on:
[API.Boilerplate.Domain\Entities\Usuario.cs:14](https://www.codefactor.io/repository/github/devcomputaria/apiboilerplate/source/main/API.Boilerplate.Domain/Entities/Usuario.cs#L14)