fix(auth): missing PhoneMultiFactorGenerator export

Author: DoctorJohn

packages/auth/__tests__/auth.test.ts

@@ -70,6 +70,7 @@ import auth, {
   OAuthProvider,
   OIDCAuthProvider,
   PhoneAuthProvider,
+  PhoneMultiFactorGenerator,
   TwitterAuthProvider,
 } from '../lib';
 
@@ -537,6 +538,10 @@ describe('Auth', function () {
       expect(PhoneAuthProvider).toBeDefined();
     });
 
+    it('`PhoneMultiFactorGenerator` class is properly exposed to end user', function () {
+      expect(PhoneMultiFactorGenerator).toBeDefined();
+    });
+
     it('`TwitterAuthProvider` class is properly exposed to end user', function () {
       expect(TwitterAuthProvider).toBeDefined();
     });

packages/auth/lib/modular/index.d.ts

@@ -779,5 +779,6 @@ export {
   OAuthProvider,
   OIDCAuthProvider,
   PhoneAuthProvider,
+  PhoneMultiFactorGenerator,
   TwitterAuthProvider,
 } from '../index';