Flutter ios stuck at 'Configuring the default Firebase app'

The answer should be available here as a quote:

1. Open Xcode, then right-click on Runner directory and select Add Files to "Runner".
2. Select GoogleService-Info.plist from the file manager.
3. A dialog will show up and ask you to select the targets, select the Runner target.
4. Then add the CFBundleURLTypes attributes below into the [my_project]/ios/Runner/Info.plist file.

<!-- Put me in the [my_project]/ios/Runner/Info.plist file -->
<!-- Google Sign-in Section -->
<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleTypeRole</key>
        <string>Editor</string>
        <key>CFBundleURLSchemes</key>
        <array>
            <!-- TODO Replace this value: -->
            <!-- Copied from GoogleService-Info.plist key REVERSED_CLIENT_ID -->
            <string>com.googleusercontent.apps.861823949799-vc35cprkp249096uujjn0vvnmcvjppkn</string>
        </array>
    </dict>
</array>
<!-- End of the Google Sign-in Section -->

I don't know if it will help now...

I found solution at https://firebase.google.com/docs/flutter/setup

It says "Using XCode, move the file into the Runner/Runner directory of your Flutter app."

When, I just copy & paste GoogleService-Info.plist at VSCode, and do flutter run. It print "Configuring the default Firebase app" infinitly.

But,

1. Execute xcode and open {your_app}/ios
2. drag & drop `GoogleService-Info.plist` at `Runner/Runner`
3. Choose `Finish`

this way fixed error.

I hope it will help other people who have same problem.

I fixed the issue by adding GoogleService-Info.plist again through Xcode.

It appears that adding the file in VS Code sometimes doesn't work.