MongoDb: Error: cannot use writeConcern without provided callback when uninstalling

Question

using MongoDB w node.js, I am trying to delete an item after searching for it .. but it does not work

• I get a collection (db.collection)
• I find the item (collection.findOne)
• I remove an item from the collection

what is wrong in my script?

exports.revokeRefreshToken = function (refreshToken, callback) { db.collection('oauth_refresh_tokens', function(err, collection) { collection.findOne({'refreshToken': refreshToken}, function(err, item) { db.collection('oauth_refresh_tokens').remove({_id: item._id}); callback(err ); }); }); 

};

Answer 1

I changed the recall function by enabling callback

 exports.revokeRefreshToken = function (refreshToken, callback) { db.collection('oauth_refresh_tokens', function(err, collection) { collection.remove({'refreshToken': refreshToken} , function(err, result) { callback(err); }); }); };