Home > @firebase/auth > MultiFactorResolver > resolveSignIn

MultiFactorResolver.resolveSignIn() method

A helper function to help users complete sign in with a second factor using an MultiFactorAssertion confirming the user successfully completed the second factor challenge.

Signature:

resolveSignIn(assertion: MultiFactorAssertion): Promise<UserCredential>;

Parameters

Parameter	Type	Description
assertion	MultiFactorAssertion	The multi-factor assertion to resolve sign-in with.

Returns:

Promise<UserCredential>

The promise that resolves with the user credential object.

Example

const phoneAuthCredential = PhoneAuthProvider.credential(verificationId, verificationCode);
const multiFactorAssertion = PhoneMultiFactorGenerator.assertion(phoneAuthCredential);
const userCredential = await resolver.resolveSignIn(multiFactorAssertion);