title: Unknown service: 'secretsmanager' or AWS Secrets Manager service is not in the list of AWS CLI
body: <p>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. </p>
  
  <blockquote>
    <p>UnknownServiceError: Unknown service: 'secretsmanager'. Valid service names are: acm, alexaforbusiness,...</p>
  </blockquote>
  
  <p>I tried a search on the AWS CLI and the service is not on the list also. </p>
  
  <pre><code>aws: error: argument command: Invalid choice, valid choices are:
  
  acm                                      | alexaforbusiness                        
  apigateway                               | application-autoscaling                 
  appstream                                | appsync     
  .
  .
  .
  </code></pre>
  
  <p>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 </p>
  
  <pre><code>sudo apt-get install -y awscli
  </code></pre>
  
  <p>an it says </p>
  
  <pre><code>awscli is already the newest version (1.11.13-1ubuntu1~16.04.0).
  </code></pre>