CHW-4410 BillyServiceTokenWrongType

target client is not a service token; service_token.disable cannot apply to user-owned credentials

Default message: target client is not a service token; service_token.disable cannot apply to user-owned credentials
HTTP status: 400 (client)

Problem. service_token.disable refused to apply. Cause. The target client exists but is not a service token (e.g. user-owned OAuth credential); we refuse to disable those via the Billy path. Fix. Manage non-service-token credentials through the OAuth admin endpoint. HTTP 400.