Please help me how can I have a facebook login

Question

How can I have that facebook app id and app secret?

I tried going to facebook developer's site by registering and clicking create new app.

I then typed the display name and namespace and chose category and clicked "Create App ID"

After that, I just copied and pasted the facebook app id and app secret...

When I tried the login button, the error says "Given URL is not allowed by the Application configuration: One or more of the given URLs is not allowed by the App's settings. It must match the Website URL or Canvas URL, or the domain must be a subdomain of one of the App's domains."

 

and tried creating an app

Comments

Update:

I tried putting my website and I see the login page...when I enter facebook details.

Here is the error:

"App Not Setup: The developers of this app have not set up this app properly for Facebook Login."