checkItem(state, item) {
      if (state.cart.length === 0) {
        state.cart.push(item)
        return
      }

      // Check if in the array the item exist
      // If it exist, foundItem === Object
      // Else, foundItem === undefined
      const foundItem = state.cart.find(c => c.id == item.id)

      // So if it found something
      // Print in the console
      // And return
      if(foundItem) {
        console.error('Item already found')
        return
      }
      // If it found nothing
      // Add it to the array
      state.cart.push(item)
    }