When a sale.order containing a slide.channel registration product is confirmed by a person that does not have rights on slide.channel (typically a salesman), the system will throw an error. This commit forces the addition of members by using a sudo on the "_action_add_members" method. We assume that when confirming a sale.order, we want to add the members and enable their access to the course even if the person confirming the sale.order does not have e-learning privileges. OPW-2580128 closes odoo/odoo#75879 X-original-commit: ecac935d3c0b5478d4e3eb8e0df9e01fce034a86 Signed-off-by: Achraf <abz-odoo@users.noreply.github.com>