Workshop Form - Adding user as Host

[XimenaColopy]

What?
On the backend add the user_id of the person who is creating the form as the host.
Use /api/profile to get that user

Why?
The host won't be a field that is added on the frontend, it needs to be figured out on the backend.

Acceptance Criteria:
When a new workshop is created using the create_workshop form the user_id of the user who created it will be added to the workshop database as the host_id