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The user can authenticate with Google and grant the requested permissions. The redirect includes an access token, which your app verifies and then uses to make API requests.Note: Given the security implications of getting the implementation correct, we strongly encourage you to use OAuth 2.0 libraries when interacting with Google's OAuth 2.0 endpoints.By requesting access to user data in context, via incremental authorization, you help users to more easily understand why your application needs the access it is requesting. Specifies any string value that your application uses to maintain state between your authorization request and the authorization server's response.The server returns the exact value that you send as a after the user consents to or denies your application's access request.Your application must have that consent before it can execute a Google API request that requires user authorization.If you are using Google APIs client library for Java Script to handle the OAuth 2.0 flow, your first step is to configure the objects.
Before you start implementing OAuth 2.0 authorization, we recommend that you identify the scopes that your app will need permission to access.var is Authorized; var current Api Request; /** * Store the request details.Then check to determine whether the user * has authorized the application.These objects enable your application to obtain user authorization and to make authorized API requests.The client object identifies the scopes that your application is requesting permission to access.