title: Setting credential in Ansible Tower GUI
body: <p>I chose credential type as 'Machine'.</p>
  
  <p>What are the required parameters for the Username and Password fields to set up a bare-minimum credential.
  Upon trying multiple times, I get :</p>
  
  <p>Enter passphrase for /tmp/awx_1977135_t5pmrI/credential_4343: </p>
  
  <p>with no option to input anything.</p>