Hashicorp Vault：“代码：400。错误”错误消息

将 Vault Agent 与机密 ID 文件一起使用时，我收到以下错误消息：

$ ./vault agent --config auth_config.hcl
==> Vault server started! Log data will stream in below:

==> Vault agent configuration:

           Api Address 1: http://127.0.0.1:8300
                     Cgo: disabled
               Log Level: info
                 Version: Vault v1.3.0

2020-02-04T14:08:28.352-0800 [INFO]  auth.handler: starting auth handler
2020-02-04T14:08:28.352-0800 [INFO]  auth.handler: authenticating
2020-02-04T14:08:28.352-0800 [INFO]  sink.server: starting sink server
2020-02-04T14:08:28.352-0800 [INFO]  template.server: starting template server
2020-02-04T14:08:28.352-0800 [INFO]  template.server: no templates found
2020-02-04T14:08:28.352-0800 [INFO]  template.server: template server stopped
2020-02-04T14:08:28.354-0800 [ERROR] auth.handler: error authenticating: error="Error making API request.

URL: PUT http://127.0.0.1:8200/v1/auth/approle/login
Code: 400. Errors:

* invalid secret id" backoff=2.190384035

我执行的命令是：

vault agent --config auth_config.hcl

我的auth_config.hcl文件的内容是：

vault {
  address = "http://127.0.0.1:8200"
}

auto_auth {
  method "approle" {
    config {
      role_id_file_path = "./role_id"
      secret_id_file_path = "./secret_id"
      remove_secret_id_file_after_reading = false
    }
  }

}

cache {
  use_auto_auth_token = true
}

listener "tcp" {
  address = "127.0.0.1:8300"
  tls_disable = true
}

我的秘密 ID 是使用以下命令生成的：

vault write -f auth/approle/role/payments_service/secret-id -format=json | sed -E -n 's/.*"secret_id": "([^"]*).*/\1/p' > secret_id

为什么会发生此错误？