Add new external codes into guest list using a CSV file as input media.

CSV File Columns

The csv file must have a header as the first line, with the same format as below:

sessionIdnamecode
234524Ticket Type 154j6g34kj6g34j5hg64k56
234525Ticket Type 154j6g34kj6g34j5hg64k56
234525Ticket Type 298hgj9g0jhg0jg0jh89g0
Language
Authorization
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