Add support for importing users with totp second factor

[pragatimodi]

No integration tests.
Manually tested input

const users = [ { uid: '3456', email: 'janedoe@example.com', emailVerified:true, multiFactor: { enrolledFactors: [ { uid: 'enrolledSecondFactor1', phoneNumber: '+16505557348', displayName: "Spouse's phone number", factorId: 'phone', enrollmentTime: nowString, }, { uid: 'enrolledSecondFactor2', phoneNumber: '+16505551000', factorId: 'phone', }, { uid: 'enrolledSecondFactor3', enrollmentTime: nowString, displayName: 'displayNameTotp', totpInfo: { sharedSecretKey: 'VIAAQYSO37EKAWB2KAXEQ7EGUMLWI3P4', }, factorId: 'totp', }, ], }, }, ]; getAuth() .importUsers(users) .then((importedUsers) => { console.log(JSON.stringify(importedUsers)); }) .catch((error) => { console.error('Error importing users:', error); }); 

with result
{"successCount":1,"failureCount":0,"errors":[]}

Further verified with console and getUser method that user has been imported successfully.