Microflow for authenticating users

I am in the process of creating a very simple, custom sign in page. All I would like the page to do is take the username and password entered by the user in the textboxes and then compare that to the usernames/passwords of the users in my database in order to validate the sign in.  Could someone please share an example microflow that would achieve this functionality? I’ve attached a picture of my domain model which just has a User entity. 
1 answers

Have a look at he page below to see how this is easily implemented using the OOTB authentication widgets that come with the modeler: