<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <template id="login" inherit_id="web.login" priority="100">
        <xpath expr="//label[@for='login']" position="replace">
            <label for="login" class="form-label">Login</label>
        </xpath>
        <xpath expr="//input[@name='login']" position="attributes">
            <attribute name="placeholder">Login</attribute>
        </xpath>
    </template>
</odoo>
