Passwd_pin = fields.Char(string="Password", size=10, readonly=True)
start_date = fields.Date(string="Start Date", readonly=True, default=fields.Date.today())
end_date = fields.Date(string="End Date", required=False, default=fields.Date.today())
state = fields.Selection([('draft','Draft'),('active','Active'),('disactive','Disactive')], string="State", default='draft')