Optionalhandler: OAuth2RefreshTokenHandler<P, ResBody, ReqBody, ReqQuery, Locals, MetaResType>Protected OptionalbadProtected OptionalhandlerProtected OptionalunsafeProtectedurlOptionalhandler: OAuth2BadRequestHandler<P, ResBody, ReqBody, ReqQuery, Locals, MetaResType>Optionalhandler: OAuth2RefreshTokenHandler<P, ResBody, ReqBody, ReqQuery, Locals, MetaResType>OptionalunsafeHandler: OAuth2RefreshTokenUnsafeHandler<