The Login Form has two parts: Login and Logout.

<form action="${pt%rt}index.htm" method="post">
<bee:access>
 Logged in as ${sys%auth:loginname}<br>
 <input type=submit class=button name=Submit value=Logout>
<bee:else>
 Username: <input class=field size=12 type=text name=username><br>
 Password: <input class=field size=12 type=password name=password>
 <input type=submit class=button name=Submit value=Login>
</bee:access>
<span class=error>${pt%AuthMessage}</span>
</form>

If you want the user to go to a particular page right after logging in, you may add a line after the <bee:else> line:

<input type=hidden name=submitredirectto value="${pt%rt}path/page.htm">

Of course, you can format the form to make it look nice.