To represent records in the memberships model, we added the Membership model:

#[derive(Debug, Identifiable, Queryable, Associations, Serialize, Deserialize)]
#[belongs_to(Channel)]
#[belongs_to(User)]
#[table_name = "memberships"]
pub struct Membership {
    pub id: Id,
    pub channel_id: Id,
    pub user_id: Id,
}

This model has set relations with the Channel and User models. For example, if you want to get all the memberships of a user, you can use the belonging_to method:

let memberships = Membership::belonging_to(&user)
    .load::<Membership>(&conn);