title: Azure B2C Microsoft Graph Authenticate user
body: <p>I have a mobile application that uses B2C UserFlow to authenticate the user.
  But for more flexibility, we would like to design the screens and just send the user credentials to Microsoft Graph to authenticate and receive the token.</p>
  <p>So far I haven't found anything that tells me that Microsoft Graph can authenticate a user in B2C.
  Does anyone know if this is possible?</p>