Can't find Google OAuth API in Developer console - google-oauth

I am implementing Login with Google using OAuth API but I can't find it to enable it on Google Developer console.

We need to enable Google+ API to implement Google OAuth in application.

Related

How does Google's Sign On Work? OAuth2.0? SAML?

I am curious about how Google's Authentication works. Does it use OAuth2.0 for Authorization? Or SAML for authentication? I tried intercepting the requests and responses, but I cannot determine how their authentication/authorization flow works.
Thanks in advance!
Signing in with a Google Account is based on OpenID Connect (OIDC). Google produces wrappers (libraries..) that do a lot of useful things on top of plain protocol. From Google's OIDC page:
If you want to provide a "Sign-in with Google" button for your website or app, we recommend using Google Sign-In, our sign-in client library that is built on the OpenID Connect protocol and provides OpenID Connect formatted ID Tokens.
G Suite also supports SAML for SSO to 3rd party apps. (You still authenticate with your Google Account)

Integration of Google+ API in Java

I have been searching for Google+ API integration with Java. All I got is that there is read-only access to it using Google+ Domain API. Is there any possible way, we can integrate google plus API in Java other than using domain API?
Right now, Google Plus api are restricted to read only mode and you can access them only by domain api.

How to implement signin via google apps account in javascript or jquery?

How to implement signin via Google Apps account in javascript or jquery ?
You can use the Google API Javascript Client Library with OAuth 2.0. It works por Google Apps accounts as well as consumer accounts, you can validate the domain after the user signs in. Another option is to use Google+ Sign In which offer other additional benefits.

is basic/digest auth sufficient in terms of security, for using an API from a Google Chrome Extension?

Is basic/digest auth sufficient for a google chrome extension to authenticate into a web based API? Can someone hack into it? I thought that I dont need OAuth because the API is not a 3rd party API but part of my service (for which I plan to create an API and the Google Chrome extension which will use the API...)

Is there any sample code that allows user the google credentials in their application using OAuth in iphone sdk

Can any one provide a sample code so that I can login to my application with the google credentials using OAuth.
Google has GData.framework which allows access to google services. Try checking it out. Not sure about access to 3rd party apps with google credentials.