Play! framework - handle a POST request

this is the route to handle the login POST request:

POST  /login/submit                 controllers.Users.loginSubmit(user : String, password : String)

this is the login.scala.html:

<form method="post" action="???">
  <input type="text" name="username" /><br/>
  <input type="password" name="password" /><br/>

  <input type="submit" value="Login" />
</form>

I got two questions:

1. what should be the value of action? is it "login/submit"?
2. how do you pass this form to be handled in the loginSubmit function?

thanks