Oath2Template for implicit authorization scenario

Hello,

I am connecting to a new service that doesn't have an existing spring social client project. This provider uses Oauth2 client side implicit authorization flow. I am creating the ServiceProvider class and need to instantiate an OAuth2Template and I don't have an accessTokenUrl and it looks like it can't be null. I looked at some existing major service providers spring social libraries but I can't seem to find this scenario. I see it mentioned in the docs for service provider online and they set the GrantType when calling oauthOperations.buildAuthorizeUrl but not sure what is the correct thing to do in the ServiceProvider class.

Thanks,
Barry