The ID of the config used for this transaction. This will ensure that the transaction will load as expected in your dashboard if you need to make any edits. Once set this cannot be edited. Available values: ["hybrid_purchase_buyer_loan", "hybrid_refinance", "hybrid_trailing_docs", "identify", "lender_heloc", "lender_loan_mod_borrower", "lender_refinance", "notarization", "other", "purchase_buyer", "purchase_buyer_loan", "purchase_seller", "real_estate_identify", "real_estate_sign", "real_estate_verify", "sign", "title_heloc", "title_loan_mod_borrower", "trailing_docs", "verify"]