The Klarna payment method used for this transaction.
Can be one of pay_later, pay_now, pay_with_financing, or pay_in_installments
Preferred language of the Klarna authorization page that the customer is redirected to.
Can be one of de-AT, en-AT, nl-BE, fr-BE, en-BE, de-DE, en-DE, da-DK, en-DK, es-ES, en-ES, fi-FI, sv-FI, en-FI, en-GB, en-IE, it-IT, en-IT, nl-NL, en-NL, nb-NO, en-NO, sv-SE, en-SE, en-US, es-US, fr-FR, en-FR, cs-CZ, en-CZ, ro-RO, en-RO, el-GR, en-GR, en-AU, en-NZ, en-CA, fr-CA, pl-PL, en-PL, pt-PT, en-PT, de-CH, fr-CH, it-CH, or en-CH
The payer details for this transaction.