Hook- adding scopes and returning only requested

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Setting up a hook that 1- add scopes 2- return only requested scopes

module.exports = function(client, scope, audience, context, cb) {
  var access_token = {};
  access_token.scope = scope;
//grouping the app ids
  const app_group1= ["id1", "id2", "id3"];
//condition - if incoming client id is inthe app_group1 id
  if (app_group1.some(app => app === client.id)) {
      //add scopes
     access_token.scope.push('a', 'b', 'c');
  }
     // return only the intersection with those scopes
    // that were originally granted (the scope parameter)
    access_token.scope = requestedScopes.filter(x => scope.indexOf(x) !== -1);
    // restrict scopes to those requested by the application    
    var requestedScopes = (context.body.scope || "").split(' ');
  cb(null, access_token);
};

However above hook returns error, not sure what I’m doing wrong.

Any help would be appreciated!

(P.S I leveraged Nicolas’ script for returning requested scopes in here: Client credentials request ignores scope parameter? - #2 by nicolas_sabena )

2

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