The GetContactImportProgress method determines the import status of a previously started contact import. Returns either Finished, NotFinished, RejectedByWatchdog or InvalidFileFormat. There is the possibility of an "Unknown" status if something went wrong internally in dotMailer.
To be used in conjunction with AddContactsToAddressBookWithProgress.
||This is the username from your API key. It is in the format of an email address and will look similar to apiuser‑firstname.lastname@example.org
||This is the password from your API key.
||This is a GUID which is returned to you when you call AddContactsToAddressBookWithProgress.
||Finished or NotFinished or RejectedByWatchdog or InvalidFileFormat or Unknown