During oAuth process it's good to set state param to authorize url for security. When I checked Überauth Shopify https://github.com/kodehort/ueberauth_shopify/blob/master/lib/ueberauth/strategy/shopify.ex#L88 it is sent to shopify.
But I don't understand how I need to set this state param in my Phoenix application that Shopify would get it. Any suggestions?