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loopback mongodb身份验证失败

我有一个空的环回应用程序,我添加了一个模型和一个mongodb数据源.

连接时,我收到以下错误:

Web server listening at: http://0.0.0.0:3000
Browse your REST API at http://0.0.0.0:3000/explorer
Connection fails:  { [MongoError: Authentication failed.]
  name: 'MongoError',
  message: 'Authentication failed.',
  ok: 0,
  code: 18,
  errmsg: 'Authentication failed.' }
It will be retried for the next request.

/media/[...]/node_modules/mongodb/lib/mongo_client.js:454
              throw err
              ^
MongoError: Authentication failed.
    at Function.MongoError.create (/media/[...]/node_modules/mongodb-core/lib/error.js:31:11)
    at /media/[...]/node_modules/mongodb-core/lib/topologies/server.js:778:66
    at Callbacks.emit (/media/[...]/node_modules/mongodb-core/lib/topologies/server.js:95:3)
    at null.messageHandler (/media/[...]/node_modules/mongodb-core/lib/topologies/server.js:249:23)
    at Socket.<anonymous> (/media/[...]/node_modules/mongodb-core/lib/connection/connection.js:265:22)
    at emitOne (events.js:77:13)
    at Socket.emit (events.js:169:7)
    at readableAddChunk (_stream_readable.js:153:18)
    at Socket.Readable.push (_stream_readable.js:111:10)
    at TCP.onread (net.js:531:20)

Run Code Online (Sandbox Code Playgroud)

db在docker中运行.我可以通过"MongoClient"连接到它

datasources.js: