In the last days I tried to integrate multiple OpenID Connect Providers into my Applications (currently mostly Alphalerts and some dev projects) So far, I only got Google to work, and even this is currently limited to 100 Users. In this blog post, I want to explain why the integration of OpenID Connect Providers is such a struggle by showing multiple examples. But before I show the examples, you should know that there are not so many big OpenID Connect Providers compared to the big OAuth2 Providers.