Such as:
EXMAPLE ERROR RESPONSE FROM MONGODB
{ [MongoError: E11000 duplicate key error index: email-dev.users.$emails.address_1 dup key: { : "email@gmail.com" }]
I20170608-10:39:47.951(-4)? name: 'MongoError',
I20170608-10:39:47.953(-4)? message: 'E11000 duplicate key error index: email-dev.users.$emails.address_1 dup key: { : "email@gmail.com" }',
I20170608-10:39:47.954(-4)? driver: true,
I20170608-10:39:47.960(-4)? code: 11000,
I20170608-10:39:47.961(-4)? index: 0,
I20170608-10:39:47.962(-4)? errmsg: 'E11000 duplicate key error index: email-dev.users.$emails.address_1 dup key: { : "email@gmail.com" }',
I20170608-10:39:47.991(-4)? getOperation: [Function],
I20170608-10:39:47.994(-4)? toJSON: [Function],
I20170608-10:39:47.996(-4)? toString: [Function] }