[Home](./index.md) > [@firebase/auth](./auth.md) > [OAuthCredentialOptions](./auth.oauthcredentialoptions.md) > [idToken](./auth.oauthcredentialoptions.idtoken.md) ## OAuthCredentialOptions.idToken property The OAuth ID token used to initialize the [OAuthCredential](./auth.oauthcredential.md). Signature: ```typescript idToken?: string; ```