Set up LinkedIn login

    1. Visit LinkedIn Developers
    2. Create new app and fill all the required fields
    3. Important: Check r_emailaddress, and in Authorized redirect URIs insert the return url for your app. Ex: http://mydomin.com/index.php/account/loginLinkedIn?authclient=linkedin
    4. Copy Client id and Client secret to EasyAds admin -> settings -> general -> API keys -> LinkedIn app id and LinkedIn app secret
    5. Click Save, now you can use LinkedIn login in your app.