title: How to get a refresh token from a service account
body: <p>Is it possible to get refresh_token from JWT requests that sends to "/oauth2/v4/token" path ?</p>
  
  <pre><code>{
    "access_token" : "1/8xbJqaOZXSUZbHLl5EOtu1pxz3fmmetKx9W8CV4t79M",
    "token_type" : "Bearer",
    "expires_in" : 3600
  }
  </code></pre>
  
  <p>The response doesn't contain refresh token key.</p>
  
  <p>ref link : <code>https://developers.google.com/identity/protocols/OAuth2ServiceAccount</code></p>