Create employment

Creates an employment without provisional_start_date validation.

This endpoint is only available in Sandbox and allows creating employments which
provisional_start_date is in the past. This is especially helpful for:

• Testing the Timeoff Balance endpoints
• Testing the Offboarding endpoints
• Testing features around probation periods

This endpoint will respond with a 404 outside of the Sandbox environment.

For creating an employment's parameters outside of testing purposes, use this
Employment create endpoint