Within the InfoQ or IBM CodeRally pages, is there a way to check / reconfirm the account details entered during registration process? Having used Google OAUTH, can one also provide twitter OAUTH details?
The only way to confirm which social media account is linked to a username is to try and login with them.
You cannot link more than one OAuth login to the same username, but one OAuth login can be linked to as many usernames as you like. If you want to use a different OAuth to the one you registered with you will need to go back to InfoQ's page and register again with a different username and your preferred social media account login.