How to convert Facebook App users to Likes?

I've a question to the Facebook experts here.
So I set up a App ID linked to my Facebook page so that users can login on my website using Facebook.

I checked my App stats after 3 months and found that I have over 500 users who have used Facebook to login as a user on my website to complete actions e.g make a blog comment. I have all the basic details of these users like first name, last name, email etc.

Is there a way for me to convert these users to fans on my Facebook page? If there's a way, that would be quite useful to engage them continuously with relevant content. TIA.

Nope...I don't think there's any way for that !

What kind of app is it?

Why dont you simply set up a good looking email and convince them to like your page?

Nonilol said:

What kind of app is it?

Why dont you simply set up a good looking email and convince them to like your page?

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Wtf are you talking about? don't type useless replies.

harizd said:

Wtf are you talking about? don't type useless replies.

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Then please explain again what you are trying to do. I thought you had a list of people that uses your app that you want to like your fb page?

Nonilol said:

Then please explain again what you are trying to do. I thought you had a list of people that uses your app that you want to like your fb page?

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No.
My website visitors can login to my website using 'Facebook login'. In order to enable this feature on my website, I had created an app using 'Facebook login API' and SDK. Now about 500 users signed in on my website and I have their details. But I want to convert them to likes as it is pointless to just have their personal details.