Is there a reason you aren't using web2py's login?
If you want to customize the login page, you can do this in
views/default/user.html:
{{if request.args(0)=='login':}}
<h2>Login</h2>
<div id="user_form">
{{=form.custom.begin}}
<p><label for="email">Email</label><br>
{{=form.custom.widget.email}}</p>
<p><label for="password">Password</label><br>
{{=form.custom.widget.password}}</p>
<p><input class="checkbox" id="auth_user_remember" name="remember"
type="checkbox" value="on" checked /> <label
for="auth_user_remember">Remember me</label></p>
<p><input type="submit" value="login" /></p>
{{=form.custom.end}}
<br/><a href="{{=URL(r=request,args='register')}}">register</a>
<br/><a
href="{{=URL(r=request,args='request_reset_password')}}">password help</a>
</div>
