access denied error

[shantanuo]

Getting this error:

User: arn:aws:sts::30237836XXXX:assumed-role/delm5c-DeleteAfterTTLStac-DeleteCFNLambdaExecution-1JN3G0KJGWPOV/DeleteCFNLambda-delm5c is not authorized to perform: ssm:DeleteParameter on resource: arn:aws:ssm:us-east-1:30237836XXXX:parameter/CFN-DemoParameter-N8kk1WlMtNg3 (Service: AmazonSSM; Status Code: 400; Error Code: AccessDeniedException; Request ID: 4bbdd9b5-51a2-4a0c-bfb6-e458c570a847)

Stack-overflow reference:

https://stackoverflow.com/questions/59405215/remove-a-template-after-5-minutes