API Reference > imodeljs-frontend > Authentication > isIOidcFrontendClient isIOidcFrontendClient Function Deprecated Use FrontendAuthorizationClient instead Beta IOidcFrontendClient type guard. isIOidcFrontendClient(client: undefined | AuthorizationClient): client is IOidcFrontendClient Parameter Type Description client undefined | AuthorizationClient Returns - client is IOidcFrontendClient Defined in core/frontend/src/oidc/OidcFrontendClient.ts Line 55 Last Updated: 29 November, 2022