title: Using one user database to authenticate users in 2 different cloud based (aws/gcp) and only once
body: <p>So this is the case:</p>
  <p><strong>What we have:</strong></p>
  <p>We have a Service (webApp) in kubernetes API + Vue.js frontend hosted in AWS.
  And we also have some Services (webApp) in Kubernetes API + React.js frontend hosted in GCP.</p>
  <p>We are able to use same domain subdomains for each (like: a.domain.com and b.domain.com).</p>
  <p><strong>What we need:</strong></p>
  <ol>
  <li><p>We need to let the user think this 2 servers are only one.</p>
  </li>
  <li><p>The idea is that the user uses the same Username/password for both servers, but</p>
  </li>
  <li><p>the most immportant part is that he only needs to log in to one of this to be logged in the other automaticaly.</p>
  </li>
  <li><p>We have the parent domain in Google, and we prefer a solution that is implemented in GCP and the AWS server should just consume this auth method/config/etc.</p>
  </li>
  </ol>
  <p>Love to hear some ideas</p>