publish your app on Google COnsole and you will be good to go
publishing the app on google console is the main thing. If you dont mind loging in once in a while you can also just press advanced on your last screenshot and then it will allow you to still use it anyway
That usually means you have a wrong client ID or put the wrong Oauth redirect URL in Google Console, or there is need for a test user / push for production in your console. I believe it will most likely be the final one (which I can relate to 
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For that, u need to do the following: Go to the google cloud console, search for “API and services”, there you will see “OAuth consent screen” in the side bar and from there you can go to “Audience” and you can first add a test user (which will work already but you will need to log in again every ~7 days if not pushed to prod) and then afterwards you can push to production.
I have done this. Added my main email id as a test user. But it is still not working. I get the following message.
If I press continue here. I get
I also get the following screen.
Then I owuld check the OAuth again under clients https://console.cloud.google.com/auth/clients to see if the application type is “web application” and double check the ID and secret and URI or rebuild the credentials with new ones from there, as the error states client authentication