POST /registration method
In order for a user to be able to log in on the B2C website after booking and view its profile and list of reservations, use POST /registration method to add the user to the database. This step is optional as there is a possibility to let users to make a reservation as a guest (i.e., without registration). However, in this case the user will not be able to log into private account and see the list of the reservations.
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