The graph API does not seem to work and states that
{
"error": {
"message": "(#803) Cannot query users by their username (the_username)",
"type": "OAuthException",
"code": 803,
"fbtrace_id": "AVC680GleTP"
}
}
However this site: https://lookup-id.com apparently can get the Facebook User id given the link. What could be the flow to get the Facebook User ID using username or link?