server-tools/sql_request_abstract/readme/USAGE.rst

Inherit the model:

    from odoo import models

    class MyModel(models.model)
        _name = 'my.model'
        _inherit = ['sql.request.mixin']

        _sql_request_groups_relation = 'my_model_groups_rel'

        _sql_request_users_relation = 'my_model_users_rel'