Poor example code for verifyScope in docs

[kristofferjansson]

Hello,

The example code for verifyScope is declaring a variable authorizedScopes that is not used and also uses a variable scope that is not declared.

function verifyScope(token, requestedScopes) {
  if (!token.scope) {
    return false;
  }
  let authorizedScopes = token.scope;
  return requestedScopes.every(s => token.scope.includes(scope));
}