Facebook取得不失效的應用程式token

https://www.rocketmarketinginc.com/blog/get-never-expiring-facebook-page-access-token/

token驗證 : https://developers.facebook.com/tools/debug/accesstoken/

換token : https://graph.facebook.com/oauth/access_token?client_id=636159539729969&client_secret=a286c312a3d05ba1826471f9b61efab9&grant_type=fb_exchange_token&fb_exchange_token=

graph explorer tool :  https://developers.facebook.com/tools/explorer/