I was trying to use AWS secrets manager service for storing secret keys. I could store the key in the secrets manager, but while retrieving the key using the code they provide I'm getting this error.

UnknownServiceError: Unknown service: 'secretsmanager'. Valid service names are: acm, alexaforbusiness,...

I tried a search on the AWS CLI and the service is not on the list also.

aws: error: argument command: Invalid choice, valid choices are:

acm                                      | alexaforbusiness                        
apigateway                               | application-autoscaling                 
appstream                                | appsync     
.
.
.

Do I need some kind of aws cli update? May be because of the CLI version that I'm using. Then, how can I update that. I tried

sudo apt-get install -y awscli

an it says

awscli is already the newest version (1.11.13-1ubuntu1~16.04.0).