refactor: the invoice and subscription flow of user

src/modules/tickets/entities/ticket.entity.ts

@@ -25,9 +25,8 @@ export class Ticket extends BaseEntity {
   @Column({ type: "enum", enum: TicketPriority, nullable: false })
   priority: TicketPriority;
 
-  //TODO:set this to not nullable
   @ManyToOne(() => DanakService, (danakService) => danakService.tickets, { onDelete: "RESTRICT", nullable: true })
-  danakService: DanakService;
+  danakService: DanakService | null;
 
   @ManyToOne(() => User, (user) => user.tickets, { nullable: true })
   assignedTo: User;