`open()` is deprecated in mongoose >= 4.11.0, use `openUri()`
`open()` is deprecated in mongoose >= 4.11.0, use `openUri()` instead, or set the `useMongoClient` option if using `connect()` or `createConnection()`. See http://mongoosejs.com/docs/connections.html#use-mongo-client Db.prototype.authenticate method will no longer be available in the next major r
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