How to retrieve Facebook Token?
The article to help you know how to retrieve Facebook token with permission manage_pages.
Go to https://fb.anhkiet.info
Click onto Login with Facebook button.
Login into your Facebook account.
Click Continue as… to install Anh Kiet Solutions app into your Facebook.
Choose the page you want to retrieve photos and click Next button.
Turn on the Manage your Pages option and click Done button.
Click OK to generate your token.
Your Facebook token will appear in next page.