Google OpenID is a great way to add single sign-on capabilities to your applications. You can use it for user authentication, allowing users to log in with their existing Google account and giving them access to your application.
If you're looking to use Google OpenID in a VB application, here are the steps to get the user's email address from the provider:
- Create a developer project with Google's APIs Console Tool
First, you'll need to create a project and an API key with the IAM & admin API console tool. This will allow you to access the necessary API functions you need to communicate with the OpenID provider.
- Create a user object
Next, you'll need to create a user object containing the OpenID info. You can do this by calling the "discover" or "parse" functions of OpenID4Java, depending on the OpenID version of the user. This will give you the endpoint URL and other connection info you need to authenticate.
- Initiate the authentication process
Now, you'll need to initiate the authentication process. This can be done by calling the Google OpenID authentication endpoint with the user's OpenID-related information.
- Get the user's email
After the authentication process is complete, you'll be able to get the user's email address from the provider. This can be done by sending a "verify" request to the Google OpenID endpoint and retrieving the appropriate information from the response.
That's it! Following these steps should help you easily integrate Google OpenID in your VB application and retrieve the user's email address. For more in-depth information, have a look at this article on OpenID integration with VB.
Hope this helps!