diff --git a/src/app/auth.service.ts b/src/app/auth.service.ts
index c662bc8..283b790 100644
--- a/src/app/auth.service.ts
+++ b/src/app/auth.service.ts
@@ -1,5 +1,5 @@
 import {inject, Injectable} from '@angular/core';
-import {Auth, getRedirectResult, GoogleAuthProvider, idToken, signInWithPopup, signInWithRedirect, signOut, user, User} from '@angular/fire/auth';
+import {Auth, getRedirectResult, GoogleAuthProvider, idToken, signInWithRedirect, signOut, user, User} from '@angular/fire/auth';
 import {BehaviorSubject, Subscription} from 'rxjs';
 
 @Injectable({
@@ -28,12 +28,6 @@ export class AuthService {
         getRedirectResult(this.auth); // ignore result
     }
 
-    signInWithPopup() {
-        const provider = new GoogleAuthProvider();
-        provider.setCustomParameters({hd: 'docchula.com'});
-        return signInWithPopup(this.auth, provider);
-    }
-
     signInWithRedirect() {
         const provider = new GoogleAuthProvider();
         provider.setCustomParameters({hd: 'docchula.com'});
diff --git a/src/app/welcome/welcome.page.ts b/src/app/welcome/welcome.page.ts
index 951776a..70f2c72 100644
--- a/src/app/welcome/welcome.page.ts
+++ b/src/app/welcome/welcome.page.ts
@@ -82,18 +82,14 @@ export class WelcomePage implements OnInit, OnDestroy {
       spinner: "crescent",
     });
     await loading.present();
+    await this.authService.signInWithRedirect().catch(async (error) => {
+        await this.alertError(
+          "Login Failed",
+          `Unable to sign in. Please try again. (${error.code}: ${error.message})`
+        );
+      })
+      .finally(() => loading.dismiss());
 
-      this.authService.signInWithPopup().catch(async (error) => {
-          if (error.code === "auth/popup-closed-by-user") {
-              // User closed the popup without completing the sign-in. May cause by popup blocker.
-              await this.authService.signInWithRedirect();
-          } else {
-              await this.alertError(
-                  "Login Failed",
-                  `Unable to sign in. Please try again. (${error.code}: ${error.message})`,
-              );
-          }
-      }).finally(() => loading.dismiss());
   }
 
   logout() {