How to reference input parameters in cloudformation template inside 'AWS::SSM::Association' command?

Question

Hi there, I have asked this similar question earlier and that got resolved.
But still I am not sure on how to achieve this.

I am stuck with the following problem:- I am creating asking an input parameter in my template like this:-

```
 Name:
    Type: String
    Description: Enter your name
Location:
    Type: String
    Description: Enter your country
```

Now, I want to get the value of this parameter in my AWS::SSM::Association resource:-

```
RunCommandAssociation1:
    Type: 'AWS::SSM::Association'
    Properties:
      Name: 'AWS-RunShellScript'
      Targets:
        - Key: InstanceIds
          Values:
            - !Ref Instance1
      Parameters:
        commands:
            name=${Name}
            location=${Location}
```
The above does not seems to be working.
Can someone please help me how can I get multiple such parameters referenced in my AWS::SSM::Association commands.

Thanks in advance!

MikeLim · Answer

Use either `!Ref` or `!Sub` as part of a string, example below for [SSM::Association](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ssm-association.html)

```
Parameters:
 MyName:
    Type: String
    Description: Enter your name
 MyLocation:
    Type: String
    Description: Enter your country

Resources:
    Type: AWS::SSM::Association
    Properties:
      Parameters:
        commands:
        - !Sub "name=${MyName}"
        - !Sub "location=${MyLocation}"
```

How to reference input parameters in cloudformation template inside 'AWS::SSM::Association' command?

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