Auth compat index

Author: sam-gc

packages-exp/auth-compat-exp/index.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import firebase from '@firebase/app';
+import firebase from '@firebase/app-compat';
 import { _FirebaseNamespace } from '@firebase/app-types/private';
 import * as impl from '@firebase/auth-exp/internal';
 import * as externs from '@firebase/auth-types-exp';
@@ -28,20 +28,22 @@ import {
 import { version } from './package.json';
 import { Auth } from './src/auth';
 import { Persistence } from './src/persistence';
+import { _getClientPlatform } from './src/platform';
 import { RecaptchaVerifier } from './src/recaptcha_verifier';
 
 const AUTH_TYPE = 'auth';
 
 // Create auth components to register with firebase.
 // Provides Auth public APIs.
-function registerAuth(instance: _FirebaseNamespace): void {
+function registerAuthCompat(instance: _FirebaseNamespace): void {
   instance.INTERNAL.registerComponent(
     new Component(
       AUTH_TYPE,
       container => {
         // getImmediate for FirebaseApp will always succeed
         const app = container.getProvider('app').getImmediate();
-        return new Auth(app);
+        const auth = container.getProvider('auth-exp').getImmediate();
+        return new Auth(app, auth as impl.AuthImpl);
       },
       ComponentType.PUBLIC
     )
@@ -80,4 +82,5 @@ function registerAuth(instance: _FirebaseNamespace): void {
   instance.registerVersion('auth', version);
 }
 
-registerAuth(firebase as _FirebaseNamespace);
+impl.registerAuth(_getClientPlatform());
+registerAuthCompat(firebase as _FirebaseNamespace);