Declaring slice of car structs you’ll use to start.

main.go

package main

type Car struct {
	ID    string `json:"id"`
	Title string `json:"title"`
	Color string `json:"color"`
}

var Cars []Car

func main() {
	Cars = []Car{
		{ID: "1", Title: "BMW", Color: "Black"},
		{ID: "2", Title: "Tesla", Color: "Red"},
	}
}