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"System.Customer.UserImportClassName" - Optional attribute. This is the name of the class that inherits from the default CustomerUserIntegration class. (e..g "CUKIntegration" for CUKIntegration.cs : CustomerUserIntegration.cs)
"System.Customer.UserImporterUsePasswordOnCreateUserImportUsePasswordOnCreate" - Optional attribute. Used as a flag for using the password column of the import file as the initial password on user creation. Valid values are 'True' or 'False'. Defaults to true if not set.
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