Change prisma schema

prisma/schema.prisma

@@ -9,3 +9,18 @@ datasource db {
   provider = "postgresql"
   url      = env("DATABASE_URL")
 }
+
+model User {
+  id         String      @id @unique
+  name       String
+  platformId String
+  platform   String
+  Inventory  Inventory[]
+}
+
+model Inventory {
+  id     Int    @id @unique @default(autoincrement())
+  userId String @unique
+  user   User   @relation(fields: [userId], references: [id])
+  items  Json
+}