CHW-4803 ClientCredentialConflict
client credential fields are invalid or conflict with an existing record; verify client_id, client_type, and expiry_date
Default message: client credential fields are invalid or conflict with an existing record; verify client_id, client_type, and expiry_date
HTTP status:400(client)
Problem. Create or update clashed with an existing record or was
otherwise invalid. Cause. Either the client_id is already taken
(create) or a field value violated validation (e.g. unsupported
client_type, malformed RFC3339 expiry_date). Fix. Pick a
different client_id, or correct the invalid field. HTTP 400.