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transtype - "BOOKINS"
login - API user's username
password - API user's password
resnumber - The reservation number for the reservation to which to add insurance
bookrequest - A BookRequest object (see also https://support.softrip.com/projects/kbase/wiki/JSON _ API _ - _BOOK and https://support.softrip.com/projects/kbase/wiki/JSON_API_-_ GETRESINSOPTIONS )
bookcommands - An array of bookcommands (as returned by GETRESINSOPTIONS) of insurance services to book
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