SQS策略未授予访问权限

Question

我创建了具有SQS策略的SQS，该策略授予对iam_user_1的访问权限

Resources:
  MyQueue:
    Type: 'AWS::SQS::Queue'
    Properties:
      QueueName:
        'Fn::Join': ['-', ["my-queue-prefix", {Ref: Stage}]]
      MessageRetentionPeriod: 60
      ReceiveMessageWaitTimeSeconds: 20

  QueuePolicy:
    Type: 'AWS::SQS::QueuePolicy'
    Properties:
      Queues:
        - {Ref: MyQueue}
      PolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Action:
              - sqs:ReceiveMessage
            Principal:
              AWS:
                - '<account_1>'
            Resource: {Ref: MyQueue}
            Condition:
              ArnEquals:
                aws:SourceArn: 'arn:aws:iam::<account_1>:user/iam_user_1'

使用此队列策略，我的用户仍然无法访问该队列-拒绝403访问。我还尝试将principal更改为

Principal:
   AWS:
      - 'arn:aws:iam::<account_1>:user/iam_user_1'

是否可以仅使用sqs策略允许iam用户访问权限以读取SQS。我是否需要修改iam用户策略以授予对sqs的访问权限？