My test user on the sandbox is testuser_jdmotorsport. What do I need to do to get this working
[Errors] => Array
[ShortMessage] => You need to create a seller's account.
[LongMessage] => Before you can list this item we need some additional information to create a seller's account.
[ErrorCode] => 120
[SeverityCode] => Error
[ErrorClassification] => RequestError