Bug: "aws sns get-topic-attribute" does not accept required parameter "--topic-arn"

Question

When executing:
```
aws sns get-topic-attributes --topic-arn arn:aws:sns:us-east-1:137112412989:amazon-linux-2023-ami-updates
```
I get an error:
```
An error occurred (InvalidParameter) when calling the GetTopicAttributes operation: Invalid parameter: TopicArn
```
Which makes the command unusable. This is a required parameter:
```
> aws sns get-topic-attributes

usage: aws [options]   [ ...] [parameters]
To see help text, you can run:

aws help
  aws  help
  aws   help

aws: error: the following arguments are required: --topic-arn
```
I'm using the latest AWS CLI version available via Homebrew on Mac:
```
❯ aws --version
aws-cli/2.13.5 Python/3.11.4 Darwin/22.5.0 source/arm64 prompt/off
```

Answer

Hi, it may just be a quote issue: see example of https://awscli.amazonaws.com/v2/documentation/api/latest/reference/sns/get-topic-attributes.html

```
aws sns get-topic-attributes \
    --topic-arn "arn:aws:sns:us-west-2:123456789012:my-topic"

Output:

{
    "Attributes": {
        "SubscriptionsConfirmed": "1",
        "DisplayName": "my-topic",
        "SubscriptionsDeleted": "0",
        "EffectiveDeliveryPolicy": "{\"http\":{\"defaultHealthyRetryPolicy\":{\"minDelayTarget\":20,\"maxDelayTarget\":20,\"numRetries\":3,\"numMaxDelayRetries\":0,\"numNoDelayRetries\":0,\"numMinDelayRetries\":0,\"backoffFunction\":\"linear\"},\"disableSubscriptionOverrides\":false}}",
        "Owner": "123456789012",
        "Policy": "{\"Version\":\"2008-10-17\",\"Id\":\"__default_policy_ID\",\"Statement\":[{\"Sid\":\"__default_statement_ID\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"*\"},\"Action\":[\"SNS:Subscribe\",\"SNS:ListSubscriptionsByTopic\",\"SNS:DeleteTopic\",\"SNS:GetTopicAttributes\",\"SNS:Publish\",\"SNS:RemovePermission\",\"SNS:AddPermission\",\"SNS:SetTopicAttributes\"],\"Resource\":\"arn:aws:sns:us-west-2:123456789012:my-topic\",\"Condition\":{\"StringEquals\":{\"AWS:SourceOwner\":\"0123456789012\"}}}]}",
        "TopicArn": "arn:aws:sns:us-west-2:123456789012:my-topic",
        "SubscriptionsPending": "0"
    }
}

```

Best,

Didier

Answer

Hi Didier,

Thanks again for looking into this, and apologise for slow response - I'm on Australia time (UTC+10).

Today I tried with one of our own topics and the command works fine. The debug output from trying a topic we don't own points to an authentication issue.

Bug: "aws sns get-topic-attribute" does not accept required parameter "--topic-arn"

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