"1.0.x is currently under preview release and not to be used for production yet. See release notes for details. Opauth API and functionalities are fully ready for evaluation. Please try it out and let us know what you think.
1.0.x is not backward-compatible with 0.x. See migration guide on how to migrate Opauth 0.x applications and strategies."
Since it's not backward compatible, it's also not compatible with Fuel's Opauth driver.