Hello, I cannot seem to create a mail.activity and evaluate for the user_id value. Please see my code below:

def _create_activity(self):
---"""Create an Odoo activity for the record on creation."""
---self.env['mail.activity'].create({
------'summary': 'Overall Equipment Efficiency',
------'user_id':self.env['res.users'].browse(self.env['ir.config_parameter'].sudo().get_param('oee.responsible_user')),'date_deadline': fields.Datetime.now() +relativedelta(months=1),
------'res_id': self.id,
------'res_model_id': self.env['ir.model']._get_id('oee.log'),
------'note': "Record machine hours from last month. Reference the previous month's record to see that starting hours for that month.",     
})

I am trying to gather the user_id from oee.responsible_user but it keeps giving me an error (Full Traceback)
ERROR: null value in column "user_id" of relation "mail_activity" violates not-null constraint
DETAIL: Failing row contains (15, 624, null, 0, null, null, Overall Equipment Efficiency,

Record machine hours from last month. Reference the previous ..., 2023-08-11, null, null, null, null, null, 2, 2023-07-11 17:52:38.94198, 2, 2023-07-11 17:52:38.94198).
2023-07-11 17:52:38,992 51 ERROR ******-odoo-sh-testing-8932533 odoo.http: Exception during JSON request handling.
Traceback (most recent call last):
File "/home/odoo/src/odoo/odoo/tools/safe_eval.py", line 332, in safe_eval
return unsafe_eval(c, globals_dict, locals_dict)
File "", line 1, in
File "/home/odoo/src/user/nxc_oee/models/oee.py", line 61, in _create_activity
self.env['mail.activity'].create({
File "", line 2, in create
File "/home/odoo/src/odoo/odoo/api.py", line 412, in _model_create_multi
return create(self, [arg])
File "/home/odoo/src/odoo/addons/mail/models/mail_activity.py", line 263, in create
activities = super(MailActivity, self).create(vals_list)
File "", line 2, in create
File "/home/odoo/src/odoo/odoo/api.py", line 413, in _model_create_multi
return create(self, arg)
File "/home/odoo/src/odoo/odoo/addons/base/models/ir_fields.py", line 613, in create
recs = super().create(vals_list)
File "", line 2, in create
File "/home/odoo/src/odoo/odoo/api.py", line 413, in _model_create_multi
return create(self, arg)
File "/home/odoo/src/odoo/odoo/models.py", line 4081, in create
records = self._create(data_list)
File "/home/odoo/src/odoo/odoo/models.py", line 4179, in _create
cr.execute(query, params)
File "", line 2, in execute
File "/home/odoo/src/odoo/odoo/sql_db.py", line 90, in check
return f(self, *args, **kwargs)
File "/home/odoo/src/odoo/odoo/sql_db.py", line 311, in execute
res = self._obj.execute(query, params)
psycopg2.errors.NotNullViolation: null value in column "user_id" of relation "mail_activity" violates not-null constraint
DETAIL: Failing row contains (15, 624, null, 0, null, null, Overall Equipment Efficiency,

Record machine hours from last month. Reference the previous ..., 2023-08-11, null, null, null, null, null, 2, 2023-07-11 17:52:38.94198, 2, 2023-07-11 17:52:38.94198).


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

Traceback (most recent call last):
File "/home/odoo/src/odoo/odoo/addons/base/models/ir_http.py", line 237, in _dispatch
result = request.dispatch()
File "/home/odoo/src/odoo/odoo/http.py", line 698, in dispatch
result = self._call_function(**self.params)
File "/home/odoo/src/odoo/odoo/http.py", line 368, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/home/odoo/src/odoo/odoo/service/model.py", line 94, in wrapper
return f(dbname, *args, **kwargs)
File "/home/odoo/src/odoo/odoo/http.py", line 357, in checked_call
result = self.endpoint(*a, **kw)
File "/home/odoo/src/odoo/odoo/http.py", line 921, in __call__
return self.method(*args, **kw)
File "/home/odoo/src/odoo/odoo/http.py", line 546, in response_wrap
response = f(*args, **kw)
File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 1324, in call_kw
return self._call_kw(model, method, args, kwargs)
File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 1316, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/home/odoo/src/odoo/odoo/api.py", line 462, in call_kw
result = _call_kw_model_create(method, model, args, kwargs)
File "/home/odoo/src/odoo/odoo/api.py", line 442, in _call_kw_model_create
result = method(recs, *args, **kwargs)
File "", line 2, in create
File "/home/odoo/src/odoo/odoo/api.py", line 412, in _model_create_multi
return create(self, [arg])
File "/home/odoo/src/odoo/addons/base_automation/models/base_automation.py", line 324, in create
action._process(action._filter_post(records))
File "/home/odoo/src/odoo/addons/base_automation/models/base_automation.py", line 274, in _process
raise e
File "/home/odoo/src/odoo/addons/base_automation/models/base_automation.py", line 271, in _process
action_server.sudo().with_context(**ctx).run()
File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions.py", line 643, in run
res = runner(run_self, eval_context=eval_context)
File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions.py", line 512, in _run_action_code_multi
safe_eval(self.code.strip(), eval_context, mode="exec", nocopy=True) # nocopy allows to return 'action'
File "/home/odoo/src/odoo/odoo/tools/safe_eval.py", line 348, in safe_eval
raise ValueError('%s: "%s" while evaluating\n%r' % (ustr(type(e)), ustr(e), expr))
Exceptiond

:

The responsible_user field is many2one on the res.users model. Might anyone here know this can be resolved? Am I retrieving the value improperly?