Implement signOut for R-GCIP

Author: mansisampat

packages/auth/demo/src/index.js

@@ -1305,6 +1305,7 @@ function onRefreshToken() {
 function onSignOut() {
   setLastUser(auth.currentUser);
   auth.signOut().then(signOut, onAuthError);
+  regionalAuth.signOut();
 }
 
 /**

packages/auth/src/core/auth/auth_impl.test.ts

@@ -308,6 +308,16 @@ describe('core/auth/auth_impl', () => {
       expect(persistenceStub._remove).to.have.been.called;
       expect(auth.currentUser).to.be.null;
     });
+    it('sets currentUser to null, calls remove', async () => {
+      const token: FirebaseToken = {
+        token: 'test-token',
+        expirationTime: 123456789
+      };
+      await auth._updateFirebaseToken(token);
+      await auth.signOut();
+      expect(persistenceStub._remove).to.have.been.called;
+      expect(auth.firebaseToken).to.be.null;
+    });
     it('is blocked if a beforeAuthStateChanged callback throws', async () => {
       await auth._updateCurrentUser(testUser(auth, 'test'));
       auth.beforeAuthStateChanged(sinon.stub().throws());

packages/auth/src/core/auth/auth_impl.ts

@@ -490,6 +490,8 @@ export class AuthImpl implements AuthInternal, _FirebaseService {
       await this._setRedirectUser(null);
     }
 
+    // Clear Firebase token for Regional Auth Instance when signOut is called
+    await this._updateFirebaseToken(null);
     // Prevent callbacks from being called again in _updateCurrentUser, as
     // they were already called in the first line.
     return this._updateCurrentUser(null, /* skipBeforeStateCallbacks */ true);