Changes to Create group

added the optional property data/teachers_can_see_members to the response with the 200 status

the data/created_by_user/allOf[#/components/schemas/User]/email response's property format changed from email to no format for status 200

added the optional property data/created_by_user/allOf[#/components/schemas/User]/additional_email to the response with the 200 status