Retrieves a virtual account request made through POST /virtual-accounts. status reports where it stands (Accepted, Allocated, Failed, Pending, Rejected): Pending until onboarding has consumed it, Accepted once the virtual IBAN exists and is being reviewed, Allocated once its account details are allocated, Rejected when refused by validation or review, Failed when it could not be completed. virtualAccountId, iban, accountNumber, sortCode and swiftBic are set as they become known. A request that does not exist or was made for another client returns 404.