我使用这里的示例从AWS SecretsManager 中检索 c# 代码中的机密。
我已经通过 AWS CLI 在本地设置了凭证，并且能够使用 AWS CLI 命令“aws secretsmanager list-secrets”检索秘密列表。
但是 c# 控制台应用程序失败并出现错误：
> Unhandled exception. System.AggregateException: One or more errors occurred. (Unable to get IAM security credentials from EC2 Instance Metadata Service.)
---> Amazon.Runtime.AmazonServiceException: Unable to get IAM security credentials from EC2 Instance Metadata Service.
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.FetchCredentials()
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.GetCredentials()
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.GetCredentialsAsync()
at Amazon.Runtime.Internal.CredentialsRetriever.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.RetryHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.RetryHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.CallbackHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.CallbackHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.ErrorCallbackHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.MetricsHandler.InvokeAsync[T](IExecutionContext executionContext)
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