Fix users being able to claim a card twice if the user has multiple of it already

src/database/entities/app/Claim.ts

@@ -0,0 +1,27 @@
+import { Column, Entity, ManyToOne } from "typeorm";
+import AppBaseEntity from "../../../contracts/AppBaseEntity";
+import Inventory from "./Inventory";
+import AppDataSource from "../../dataSources/appDataSource";
+
+@Entity()
+export default class Claim extends AppBaseEntity {
+    constructor(claimId: string) {
+        super();
+
+        this.ClaimId = claimId;
+    }
+
+    @Column()
+    ClaimId: string;
+
+    @ManyToOne(() => Inventory, x => x.Claims)
+    Inventory: Inventory;
+
+    public static async FetchOneByClaimId(claimId: string): Promise<Claim | null> {
+        const repository = AppDataSource.getRepository(Claim);
+
+        const single = await repository.findOne({ where: { ClaimId: claimId }});
+
+        return single;
+    }
+}