Google sign-in without firebase

[omarbelkhodja]

In most of tutorials on the web, I can see that the plugin google_sign_in doesn't require firebase. In pub page, it is mentioned that the application must be registered in the following link :
https://developers.google.com/mobile/add?platform=android

That link is now redirecting to firebase's homepage. So my question is:
Is it still possible to Sign-in without firebase ? Where should I register the app in that case ?

[mhrst]

For using google_sign_in with a plain Google Cloud project, here's what I'm doing:

• From the GCP Console for your project, go to APIs & Services > Credentials (https://console.cloud.google.com/apis/credentials)
• Click the Create Credentials button, select OAuth Client ID
• On the next screen, select Android as the Application Type
• Fill in Signing-certificate fingerprint
• Fill in Package name

It seems like creating a Firebase app takes care of this step for you (and does a bunch of other things to your GCP project as well), but it's the only thing required for basic login as far as I can tell.

[thehitechpanky]

This method does not give idtoken

[novembrea]

It does, you need to make sure to register both SHA-1 and SHA-256 keys in project settings.

[BondarenkoStas]

@omarbelkhodja Is the issue still relevant after comments above?

[anoop-ananthan]

Yes, this is a big problem. There don't seem to be any documentation except #36673 (comment). Thanks @truthmast

[TahaTesser]

From #73455 by @avioli
#73455 (comment) should be documented to avoid running into issues

[aacassandra]

works fine for android and not for ios. i spend a lot of time on ios regarding google login without firebase

[tiagocdr]

Any Solutions for IOS ? Every solution I have found has been only for android

[toan-ngvan]

I find the solution. Just download the .plist file from gg cloud, rename the file to GoogleService-Info.plist and put it in Runner.

[zzundalek]

Please at least clarify it.

• Is firebase required for google_sign_in to work on iOS?
• If yes add it to plugin description if no add working example without firebase

Thanks a lot.

[mhrst]

Updating my instructions from a previous comment to include steps for setting up iOS

For using google_sign_in with a plain Google Cloud project (no Firebase required), here's what I'm doing:

Android

• From the GCP Console for your project, go to APIs & Services > Credentials (https://console.cloud.google.com/apis/credentials)
• Click the Create Credentials button, select OAuth Client ID
• On the next screen, select Android as the Application Type
• Fill in Signing-certificate fingerprint
  • For instructions on finding your signing-certificate fingerprint, https://developers.google.com/android/guides/client-auth)
• Fill in Package name

iOS

• From the GCP Console for your project, go to APIs & Services > Credentials (https://console.cloud.google.com/apis/credentials)
• Click the Create Credentials button, select OAuth Client ID
• On the next screen, select iOS as the Application Type
• Fill in Bundle ID
• After clicking Create a dialog will open with a DOWNLOAD PLIST button -- Grab this file and rename it to GoogleService-Info.plist
• Open Xcode and put this plist file into the Runner folder

[anqit]

Everything online says google_sign_in can be used on android without having to explicitly set the client_id when instantiating the GoogleSignIn instance. When I was using firebase, this worked fine. Now, I'm trying without firebase and am not able to get an id_token unless not only I do specify the client_id but also make sure to not use the android one I created but use the web one instead. Is this because I have misconfigured something or is this expected behavior? I definitely must echo the sentiment that documentation for this basic functionality seems to be sorely lacking.

[wildsylvan]

same as @anqit

here #20903 are some workarounds

[jaybe78]

I followed this documentation https://medium.com/codebrew/flutter-google-sign-in-without-firebase-3680713966fb
Since I've changed classpath 'com.google.gms:google-services:4.3.15'
I'm getting the following issue
requires google-services.json file where that is coming from firebase

this is quite confusing because that issue mentioned by different people is always related to firebase

[nevsnirG]

Updating my instructions from a previous comment to include steps for setting up iOS

For using google_sign_in with a plain Google Cloud project (no Firebase required), here's what I'm doing:

Android

* From the GCP Console for your project, go to **APIs & Services** > **Credentials** (https://console.cloud.google.com/apis/credentials)

* Click the **Create Credentials** button, select **OAuth Client ID**

* On the next screen, select **Android** as the Application Type

* Fill in **Signing-certificate fingerprint**
  
  * For instructions on finding your signing-certificate fingerprint, https://developers.google.com/android/guides/client-auth)

* Fill in **Package name**

iOS

* From the GCP Console for your project, go to **APIs & Services** > **Credentials** (https://console.cloud.google.com/apis/credentials)

* Click the **Create Credentials** button, select **OAuth Client ID**

* On the next screen, select **iOS** as the Application Type

* Fill in **Bundle ID**

* After clicking **Create** a dialog will open with a **DOWNLOAD PLIST** button -- Grab this file and rename it to `GoogleService-Info.plist`

* Open Xcode and put this plist file into the `Runner` folder

Sadly I still get this error:
[_handleGoogleLogin] Google login failed: Exception: Failed to login with Google: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null, null)
Exception: Failed to login with Google: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , ...

I verified the SHA-1 hash a million times. Generated a new keystore and tried that. Package name matches in the build.gradle and AndroidManifest too. Tried making new Android credentials in the Google Console. Still nothing unfortunately.

[Dzivo]

Having the same problem even with firebase i have flavors setup so something can be an issue there. Really anoying errors dont say whats wrong. Shouldnt this be fixed asap ? This is like breaking of the breakings bug