Google has cancelled OpenID URL logins, unfortunately, according to the Google One Support representative I spoke to today. (They provided chat ID 7-0404000030383 for future reference, though I assume only myself and authorized Google folks can access it.)
So none of the schemes provided in previous answers here (via your Google Profile, Google Plus, etc) ...
You are absolutely right that this can be confusing sometimes. In case of Uber it is especially weird since the Google search result for 'Uber app login' shows
Sign In. Connect with Facebook. or use email. Email. Password. Remember Me. Sign In. Forgot Password. Don't have an account? Sign Up.
and the Uber page itself does not offer this option. However ...
Are they seriously saying they're going to follow people and post tweets using my account without my intervention?
The scope of the authorization is that should you authorize, they can tweet, follow, and update your profile.
Note that it's they can, not that they will. Twitter's authorization scope allows for read-only, read+write, read+write+send dm
Let's just start with Twitter for the site that you mentioned weheartit.com
If you don't how that login is provided. The site(weheartit.com) had created a twitter application at http://dev.twitter.com and made the app with read , write permissions. (You don't wanna get into the coding part unless you're a programmer).
It is the same with Facebook, Google+ ...
SourceForge is attempting to phase out OpenID logins in favor of social logins, according to their support forum.
For now, you can append openid to the login page, so it looks like https://sourceforge.net/account/login.php?openid.
This is not possible on Wordpress.com hosting. The "plugin" optionality is highly limited and curated on Wordpress.com - so to get a wider breadth of functionality, an upgrade to self-hosted WP is needed.
Ok, so here is what was going on. The application in question was using Google's OpenId API for authentication. Google implements something called "directed identity" and basically what that does is returns a different OpenId for every domain that is requesting authentication. That is understandable but how does that explain the issue I was seeing? Well, ...
I once closed or disabled my Google+ and next time I wanted to log in to Stackexchange I got a weird message about missing Google+ and it wanted me to activate it again.
So if you close your Google+ you will probably not be allowed to use OpenID until you activate it again.
At least that's what happened to me. This was a while ago so Google might have ...
Signing into a third-party service with your Google account usually does give Google services access to activity on that account. This is useful to the end user mostly on social services by allowing you to easily share activity on Google+.
By default, your posted activity in apps you've signed into with Google is visible to everyone in your circles on G+. ...
The Trello help site lists the following steps:
Once you've ensured there's not already an account for
email@example.com, use the following steps:
Log out of Trello
Log in to Trello using your firstname.lastname@example.org account.
Create a password for this account at
https://trello.com/your/account (note the password, you'll need it
Once you've given your Google permission to IMDb, Logout. Now, try logging into IMDb using the usual IMDb login screen, enter your Gmail email address and then click on "Forgot password"
They'll send you a link on your Gmail account, click on it, change the password as desired.
Now, login through that new password and email address you have.
Go to https://...