title: ansible user current user in configuration
body: <p>I am using ansible to configure the several computers after installation.</p>
  
  <p>For this I run ansible locally on the machines. The "main" user on the installation has often a different name. I want to use that user for variables like <code>become_user</code>. The "main" user is also the user, who calls <code>ansible-playbook</code>.</p>
  
  <p>So can I somehow set "become_user" to the user who called <code>ansible-playbook</code>?</p>