Project: /docs/reference/js/_project.yaml Book: /docs/reference/_book.yaml page_type: reference

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MultiFactorError interface

The error thrown when the user needs to provide a second factor to sign in successfully.

The error code for this error is auth/multi-factor-auth-required.

Signature:

typescript

export interface MultiFactorError extends AuthError

Extends: AuthError

Properties

Property	Type	Description
customData	AuthError<!-- -->['customData'] & { readonly operationType: (typeof OperationTypeMap<!-- -->)[keyof typeof OperationTypeMap<!-- -->]; }	Details about the MultiFactorError.

MultiFactorError.customData

Details about the MultiFactorError.

Signature:

typescript

readonly customData: AuthError['customData'] & {
        readonly operationType: (typeof OperationTypeMap)[keyof typeof OperationTypeMap];
    };

Example

javascript

let resolver;
let multiFactorHints;

signInWithEmailAndPassword(auth, email, password)
    .then((result) => {
      // User signed in. No 2nd factor challenge is needed.
    })
    .catch((error) => {
      if (error.code == 'auth/multi-factor-auth-required') {
        resolver = getMultiFactorResolver(auth, error);
        multiFactorHints = resolver.hints;
      } else {
        // Handle other errors.
      }
    });

// Obtain a multiFactorAssertion by verifying the second factor.

const userCredential = await resolver.resolveSignIn(multiFactorAssertion);