Edit to my own question, in the hope that this might be helpful for others.
If like me, you're having trouble creating customers or tokens, with errors like: {"ok":false,"error":"Organization not found for user's role."} or {"ok":false,"error":"Not Found"} refer to rickkas7 s post. There is an very succinct explanation of tokens and scope, which is not covered in the documentation.
Cheers,
Al.