Handle many-to-many relations in Prisma with MySQL

model User {
  id String @id @default(cuid())
  name String
  shoppingList ShoppingList[]
}

model ShoppingList {
  id String @id @default(cuid())
  name String
  items Item[]
  user User @relation(fields: [userId], references: [id])
  userId String
}

model Item {
  id String @id @default(cuid())
  name String
  productName String
  category String
  shoppingList ShoppingList[] @relation(fields: [shoppingId], references: [id])
  shoppingId String
}