add to constants section, pid of user-storage-folder:

plugin.feadmin.fe_users.pid = 37

logout form:

<FORM ACTION="index.php?id=6" enctype="multipart/form-data" method="POST" target="_top" name=logoutform>

<input type="hidden" name="logintype" value="logout">

<input type="hidden" name="pid" value="33">

</form>

Sample form for login, action to a protected page id:

<FORM ACTION="index.php?id=36" enctype="multipart/form-data" method="POST" target="_top" name=loginform>

<input type="hidden" name="logintype" value="login">

<input type="hidden" name="pid" value="37">

<input type=text name=user class="field">

<input type=password name=pass class="field">

OK

</form>