server-tools/base_model_restrict_update/views/res_users_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <record id="view_users_form" model="ir.ui.view">
        <field name="name">res.users.form</field>
        <field name="model">res.users</field>
        <field name="inherit_id" ref="base.view_users_form" />
        <field name="arch" type="xml">
            <div class="oe_button_box" name="button_box" position="inside">
                <button name="toggle_unrestrict_model_update" type="object" class="oe_stat_button" icon="fa-pencil">
                    <field name="unrestrict_model_update" widget="boolean_button"
                           options='{"terminology": {"string_true": "Update Permit", "string_false": "Unpermitted"}}'/>
                </button>
            </div>
        </field>
    </record>

</odoo>