Hi, in a production server i need to create the admin user when i init the db from the cli (using -i base --stop-after-init --without-demo). The db is manualy create with psql and i set db_name and list_db=false.

Online I found to use the shell with  a custom python script (example --shell-file=odoo.createadmin.py) and here my script

login = "sandbox@odoo.com"
pwd = "Password123"
name = "Sandbox Admin"

Users = env["res.users"].sudo().with_context(active_test=False)
u = Users.search([("login", "=", login)], limit=1)

vals = {
    "name": name,
    "login": login,
    "email": login,
    "share": False,
    "active": True,
}

if not u:
    vals["password"] = pwd
    u = Users.create(vals)
else:
    vals["password"] = pwd
    u.write(vals)

group_user = env.ref("base.group_user")
group_system = env.ref("base.group_system")

# Prova a scrivere direttamente su res.users
try:
    u.write({
        "groups_id": [(4, group_user.id, 0), (4, group_system.id, 0)]
    })
except Exception:
    # Se fallisce, prova tramite il partner
    if not u.partner_id:
        partner = env['res.partner'].create({
            'name': name,
            'email': login,
        })
        u.write({'partner_id': partner.id})
    u.partner_id.write({
        'groups_id': [(6, 0, [group_user.id, group_system.id])]
    })

env.cr.commit()

But I get

env: <odoo.orm.environments.Environment object at 0x7f1ce4d62c40>
odoo: <module 'odoo' (namespace) from ['/opt/odoo/odoo-server/odoo']>
openerp: <module 'odoo' (namespace) from ['/opt/odoo/odoo-server/odoo']>
self: res.users(1,)
Traceback (most recent call last):
  File "/opt/odoo/odoo-server/odoo/orm/models.py", line 4381, in write
    self._check_field_access(self._fields[field_name], 'write')
                             ~~~~~~~~~~~~^^^^^^^^^^^^
KeyError: 'groups_id'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "odoo.createadmin.py", line 28, in <module>
    u.write({
    ~~~~~~~^^
        "groups_id": [(4, group_user.id, 0), (4, group_system.id, 0)]
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    })
    ^^
  File "/opt/odoo/odoo-server/odoo/addons/base/models/res_users.py", line 1370, in write
    res = super().write(vals)
  File "/opt/odoo/odoo-server/odoo/addons/base/models/res_users.py", line 617, in write
    res = super().write(vals)
  File "/opt/odoo/odoo-server/odoo/orm/models.py", line 4383, in write
    raise ValueError(f"Invalid field {field_name!r} in {self._name!r}") from e
ValueError: Invalid field 'groups_id' in 'res.users'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "odoo.createadmin.py", line 39, in <module>
    u.partner_id.write({
    ~~~~~~~~~~~~~~~~~~^^
        'groups_id': [(6, 0, [group_user.id, group_system.id])]
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    })
    ^^
  File "/opt/odoo/odoo-server/odoo/addons/base/models/res_partner.py", line 880, in write
    pre_values_list = [{fname: partner[fname] for fname in vals} for partner in self]
                               ~~~~~~~^^^^^^^
  File "/opt/odoo/odoo-server/odoo/orm/models.py", line 6686, in __getitem__
    return self._fields[key].__get__(self)
           ~~~~~~~~~~~~^^^^^
KeyError: 'groups_id'

What is the correct way? I search in the docs but withour success.

Thanks