Cannot delete Tags in Elemental MediaTailor Playback Configurations

[thatsddr]

Confirm by changing [ ] to [x] below to ensure that it's a bug:

• I've gone though Developer Guide and API reference
• I've checked AWS Forums and StackOverflow for answers
• I've searched for previous similar issues and didn't find any solution

Describe the bug
I am using the SDK to update Elemental MediaTailor Playback Configuration using the PutPlaybackConfiguration method.
When I try to update the Tags field (type map[string]*string) of a Playback Configuration with another map that does not include some or all the tags previously included, the previous tags are not deleted.

Version of AWS SDK for Go?
v1.43.27

Version of Go (go version)?
Go1.17.6

To Reproduce (observed behavior)

1. Initialize MediaTailor

   s, err := session.NewSession(&aws.Config{Region: aws.String("eu-central-1")})
   if err != nil {
   	return
   }
   client := mediatailor.New(s)

2. Create a Playback Configuration with tags

   inputWithTags := mediatailor.PutPlaybackConfigurationInput{
   		AdDecisionServerUrl:   aws.String("https://example.org/ads"),
   		Name:                  aws.String("example"),
   		VideoContentSourceUrl: aws.String("https://example.org/"),
   		Tags:                  map[string]*string{
   		    "tag1": aws.String("value"), 
   		    "tag2": aws.String("another value"),
   		},
   	}
   _, err = client.PutPlaybackConfiguration(&inputWithTags)

3. Run aws mediatailor get-playback-configuration --name="example" and verify that Tags is equal to:

   "Tags": {
       "tag1": "value",
       "tag2": "another value"
   },

4. Update the Tags value to an empty map

   inputWithoutTags := mediatailor.PutPlaybackConfigurationInput{
   	AdDecisionServerUrl:   aws.String("https://example.org/ads"),
   	Name:                  aws.String("example"),
   	VideoContentSourceUrl: aws.String("https://example.org/"),
   	Tags:                  aws.StringMap(map[string]string{}),
   }
   _, err = client.PutPlaybackConfiguration(&inputWithoutTags)

5. Run aws mediatailor get-playback-configuration --name="example" and verify that Tags is still equal to:

   "Tags": {
       "tag1": "value",
       "tag2": "another value"
   },

Expected behavior
After updating the Tags field with an empty map, its value should be equal to:

    "Tags": {}

[thatsddr]

For everyone else encountering the same problem, I am using the UntagResource method as a workaround.

I manually check for differences in the tags and create a list of values that have to be removed, then I call both the UntagResource and PutPlaybackConfiguration methods to edit the tags and everything else respectively.

[vudh1]

Hi, I have reproduced this and seems like when the tags argument is empty, it will be ignored. I will run some more tests to see how other SDKs behavior with this and update again.