title: Is it possible to do OAuth2 Authentication with Username & Password only with Marketo?
body: <p>Is it possible to do OAuth2 authentication like facebook/ google login, which only requires users to enter their username &amp; password, without providing their client_id &amp; client_secret?</p>
  
  <p>The steps displayed here require the user to provide his client_id &amp; client_secret for authentication.
  <a href="http://developers.marketo.com/documentation/rest/authentication/" rel="nofollow noreferrer">http://developers.marketo.com/documentation/rest/authentication/</a></p>