Could not connect to DB

[28kayak]

``connection error: { MongoError: auth failed
at Object.toError (C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\utils.js:110:11)
at C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\auth\mongodb_cr.js:34:33
at C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\db.js:1670:9
at Server.Base._callHandler (C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\connection\base.js:382:41)
at C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\connection\server.js:472:18
at MongoReply.parseBody (C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\responses\mongo_reply.js:68:5)
at . (C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\connection\server.js:430:20)
at emitOne (events.js:96:13)
at emit (events.js:188:7)
at . (C:\Users\kaya\Documents\todo_app\node_modules\mongodb\lib\mongodb\connection\connection_pool.js:191:13) name: 'MongoError'
, ok: 0, errmsg: 'auth failed', code: 18 }