Were you able to find the right Providers within google-sign-in ? If you're also a provider of google-sign-in and you're not featured in the business directory yet, you can always Add an entry for free.
The results list for google-sign-in in Start. You can find the best google-sign-in vendors and providers in Start in the Start Business Directory. Currently there is no company is registered in the Start business directory under google-sign-in.