mongodb - 为什么无法从 Vapor + MongoKitten 连接到 mLab？

Question

尝试mLab使用凭据连接，但出现此错误：

fatal error: Error raised at top level: MongoKitten.AuthenticationError.incorrectCredentials: file /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-900.0.65/src/swift/stdlib/public/core/ErrorType.swift, line 187

我的代码：

let server = try Server("mongodb://xxx:xxx@ds155424.mlab.com:55424")
let database = server["db1"]
let document: Document = ["_id":"asdf"]
try database["full"].append(document)