odoo/addons/web_calendar/security/ir.model.access.csv

1	id	name	model_id:id	group_id:id	perm_read	perm_write	perm_create	perm_unlink
2	access_web_calendar_contacts_all	access_web_calendar_contacts_all	model_web_calendar_contacts		1	1	1	1
3	access_web_calendar_contacts	access_web_calendar_contacts	model_web_calendar_contacts	base.group_system	1	1	1	1