title: Your credentials are invalid. Please run $ gcloud auth login
body: <p>gsutil was working as a stand-alone on my system.
  Then I installed SDK, including some authentication stuff.
  Now gsutil says my credentials are invalid.</p>
  
  <pre><code>$ gcloud auth login wolfvolpi@gmail.com
  WARNING: `gcloud auth login` no longer writes application default credentials.
  If you need to use ADC, see:
    gcloud auth application-default --help
  
  You are now logged in as [redacted].
  Your current project is [redacted].  You can change this setting by running:
    $ gcloud config set project PROJECT_ID
  $ gsutil ls
  Your credentials are invalid. Please run
    $ gcloud auth login
  </code></pre>
  
  <p>How to set my credentials so that gsutil runs again?</p>
  
  <pre><code>$ gcloud version
  Google Cloud SDK 146.0.0
  core 2017.02.28
  core-nix 2017.02.28
  gcloud 
  gcloud-deps 2017.02.28
  gcloud-deps-linux-x86_64 2017.02.28
  gsutil 4.22
  gsutil-nix 4.22
  </code></pre>