我很难弄清楚如何在Kotlin中读取YAML文件。
简而言之，YAML具有以下格式：

aws:
  foo:
    dev:
      id: '1111'
    pro:
      id: '2222'
  bar:
    dev:
      id: '3333'
    pro:
      id: '4444'

我已经创建了这些数据类：

data class Account (
        val id: String
)

data class Owner (
        val accounts: List<Account>
)

data class Cloud (
        val owners: List<Owner>
)

然后，我尝试使用以下语句解析该文件：

val mapper = ObjectMapper().registerModule(KotlinModule())
val settings: Cloud = mapper.readValue(Path.of("accounts.yaml").toFile())

# also tried this

val settings: List<Cloud> = mapper.readValue(Path.of("accounts.yaml").toFile())
println(settings)

println因Exception in thread "main" com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'aws': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')而失败
为什么？