error callback is not a function

[Mkpa]

Pls I need help to go round this error. It's evident that some had already encountered it. I've tried editing the index.js file. Yet no positive response still. I always get
return callback (null, options); //happens on line 154

TypeError: callback is not a function

[frankcash]

hello, please include your code

[cpuzzuol]

You need to add a callback to generateTempUserModel like so:

nev.generateTempUserModel(User, function(err, tempUserModel) {
    if (err) {
       console.log(err);
       return;
    }

    console.log('generated temp user model: ' + (typeof tempUserModel === 'function'));
  });