[Home](./index.md) > [@firebase/auth](./auth.md) > [User](./auth.user.md) > [refreshToken](./auth.user.refreshtoken.md) ## User.refreshToken property Refresh token used to reauthenticate the user. Avoid using this directly and prefer [User.getIdToken()](./auth.user.getidtoken.md) to refresh the ID token instead. Signature: ```typescript readonly refreshToken: string; ```