Replaced the `Authorize` method with a new `WithAuth` method in the `CreateEnvelopeCommand` class. The new method sets the `UserId` property and returns the current instance, enabling method chaining and improving usability.
Replaced the `Authorize` method with a new `WithAuth` method in the `CreateEnvelopeCommand` class. The new method sets the `UserId` property and returns the current instance, enabling method chaining and improving usability.