use crate::db::{BillingPreferencesId, UserId};use sea_orm::entity::prelude::*; #[derive(Clone, Debug, Default, PartialEq, Eq, DeriveEntityModel)]#[sea_orm(table_name = "billing_preferences")]pub struct Model {    #[sea_orm(primary_key)]    pub id: BillingPreferencesId,    pub created_at: DateTime,    pub user_id: UserId,    pub max_monthly_llm_usage_spending_in_cents: i32,} #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]pub enum Relation {    #[sea_orm(        belongs_to = "super::user::Entity",        from = "Column::UserId",        to = "super::user::Column::Id"    )]    User,} impl Related<super::user::Entity> for Entity {    fn to() -> RelationDef {        Relation::User.def()    }} impl ActiveModelBehavior for ActiveModel {}