curl --location '/api/v1/book_classes' \
--header 'Accept: application/json' \
--header 'Authorization: Bearer <token>' \
--form 'area="current area"' \
--form 'package_id="1"' \
--form 'package_type_id="1"' \
--form 'start_training="immediately"' \
--form 'have_bike="Bicycle"' \
--form 'be_trainer="1"'{}