i'am using web_notify module wihch belongs to OCA web modules it works will if i'am using it's methods in buttons , but i'am tried to use it in a corn job it doesn't work
here is the oca model with my method at lest of it, 

from odoo import _, api, exceptions, fields, models
DEFAULT_MESSAGE = "Default message"


SUCCESS = "success"
DANGER = "danger"
WARNING = "warning"
INFO = "info"
DEFAULT = "default"




class ResUsers(models.Model):
    _inherit = "res.users"

    
    @api.depends("create_date")
    def _compute_channel_names(self):
        for record in self:
            res_id = record.id
            record.notify_success_channel_name = "notify_success_%s" % res_id
            record.notify_danger_channel_name = "notify_danger_%s" % res_id
            record.notify_warning_channel_name = "notify_warning_%s" % res_id
            record.notify_info_channel_name = "notify_info_%s" % res_id
            record.notify_default_channel_name = "notify_default_%s" % res_id
    notify_success_channel_name = fields.Char(compute="_compute_channel_names")
    notify_danger_channel_name = fields.Char(compute="_compute_channel_names")
    notify_warning_channel_name = fields.Char(compute="_compute_channel_names")
    notify_info_channel_name = fields.Char(compute="_compute_channel_names")
    notify_default_channel_name = fields.Char(compute="_compute_channel_names")
    def notify_success(
        self, message="Default message", title=None, sticky=False
    
    ):
        title = title or _("Success")
        self._notify_channel(SUCCESS, message, title, sticky)
    def notify_danger(
        self, message="Default message", title=None, sticky=False
    
    ):
        title = title or _("Danger")
        self._notify_channel(DANGER, message, title, sticky)
    def notify_warning(
        self, message="Default message", title=None, sticky=False
    
    ):
        title = title or _("Warning")
        self._notify_channel(WARNING, message, title, sticky)
    def notify_info(self, message="Default message", title=None, sticky=False):
        title = title or _("Information")
        self._notify_channel(INFO, message, title, sticky)
    def notify_default(
        self, message="Default message", title=None, sticky=False
    
    ):
        title = title or _("Default")
        self._notify_channel(DEFAULT, message, title, sticky)
    def _notify_channel(
        self,
        type_message=DEFAULT,
        message=DEFAULT_MESSAGE,
        title=None,
        sticky=False,
    ):
        # pylint: disable=protected-access
        
        if not self.env.user._is_admin() and any(
            user.id != self.env.uid for user in self
        
        ):
            raise exceptions.UserError(
                _("Sending a notification to another user is forbidden.")
            )
        channel_name_field = "notify_{}_channel_name".format(type_message)
        bus_message = {
            "type": type_message,
            "message": message,
            "title": title,
            "sticky": sticky,
        }
        notifications = [
            (record[channel_name_field], bus_message) for record in self
        
        ]
        self.env["bus.bus"].sendmany(notifications)
    def testnoty(self):
        print('/n ssssssssssssssssssss')
        return self.env.user.notify_success(message='noo')

 and this the XML corn job

<record id="test_notify_crons" model="ir.cron">
    <field name="name">test cron Notificaton</field>
    <field name="model_id" ref="model_res_users"/>
    <field name="state">code</field>
    <field name="code">model.testnoty()</field>
    <field name="interval_number">1</field>
    <field name="interval_type">minutes</field>
    <field name="numbercall">-1</field>
    <field name="doall" eval="False"/>
</record>