By Yantoultra Ngui SINGAPORE, Jan 21 (Reuters) - Airwallex has acquired South Korea's Paynuri Co Ltd, securing local payments licences and a foreign-exchange business registration that will ​allow it to operate directly in the country as the Australia-founded fintech expands ‌in Asia. The deal follows a December funding round that valued Airwallex at $8 billion. Airwallex said on Wednesday that the ‌acquisition gave it Paynuri's Payment Gateway and Prepaid Electronic Payment Instrument licences, as wel ...