fix(Profile): Fixed the fetching of a workos profile.

[SanderVerkuil]

The getProfile method was not properly implemented and tested, wrote a test scenario for that to ensure that it works properly now.

Description

Fixed an issue because the json method does not exist on the Profile class.

Documentation

Does this require changes to the WorkOS Docs? E.g. the API Reference or code snippets need updates.

[ ] Yes

If yes, link a related docs PR and add a docs maintainer as a reviewer. Their approval is required.