Get a long-lived user access token for Facebook
cc_get_fb_long_user_token.Rd
For details, see https://developers.facebook.com/docs/facebook-login/guides/access-tokens/get-long-lived/
Usage
cc_get_fb_long_user_token(
fb_user_token = NULL,
fb_app_id = NULL,
fb_app_secret = NULL,
api_version = "v21.0"
)