Add contacts from a csv file to an audience

put https://api.indigitall.com/v2/inapp/audience/{id}/contacts/csv

Add contacts from a csv file to an audience. Only can add externalCode or deviceId.

For removing users from an audience, there is other endpoint.

All the previous externals Id will be removed.

CSV format example:

externalCode
be5d3f02-f486-47e2-bd98-5128e1c4b065