Cloud Firestoreのローカルエミュレータでエラーになる

前提・実現したいこと

Cloud Firestoreのローカルエミュレータを使いたい

コマンド実行
$ export FIRESTORE_EMULATOR_HOST=localhost:8812
$ gcloud beta emulators firestore start --host-port=localhost:8812
この順でエミュレータを立ち上げています

発生している問題・エラーメッセージ

{"time":"2020-06-11T10:19:11.789139+09:00","id":"","remote_ip":"::1","host":"localhost:8080","method":"GET","uri":"/","user_agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36","status":404,"error":"code=404, message=Not Found","latency":152536,"latency_human":"152.536µs","bytes_in":0,"bytes_out":24}
2020/06/11 10:19:23 rpc error: code = NotFound desc = The project testing does not exist or it does not contain an active Cloud Datastore or Cloud Firestore database. Please visit http://console.cloud.google.com to create a project or https://console.cloud.google.com/datastore/setup?project=testing to add a Cloud Datastore or Cloud Firestore database. Note that Cloud Datastore or Cloud Firestore always have an associated App Engine app and this app must not be disabled.
exit status 1
(base) takeuchikaoru@takeuchikaorunoMacBook-Pro training_2020_kaoru_takeuchi %

該当のソースコード

main
1package main
2
3import (
4	"github.com/labstack/echo"
5	"github.com/labstack/echo/middleware"
6	"github.com/topgate/training_2020_kaoru_takeuchi/handler"
7)
8
9func main() {
10	e := echo.New()
11	e.Use(middleware.Logger())
12	e.Use(middleware.Recover())
13	e.GET("/user/:id",handler.GetUser)
14	e.POST("/user",handler.CreateUser)
15	e.PUT("/user/:id",handler.UpdateUser)
16	e.DELETE("/user/:id",handler.DeleteUser)
17	e.Logger.Fatal(e.Start(":8080"))
18}

user
1func CreateUser(c echo.Context) error{
2	uuid := uuid.New().String()
3	userModel := &model.User{
4		ID: uuid,
5		Email: c.FormValue("email"),
6		PassWord: c.FormValue("password"),
7		UserName: c.FormValue("name"),
8	}
9	Repository.Add(*userModel)
10	//同じEmailの確認とDB書き込み処理
11
12	return c.JSON(http.StatusOK, userModel)
13}

Repository
1kage Repository
2
3import (
4	"context"
5	"cloud.google.com/go/firestore"
6	"log"
7)
8
9
10func Add(usermodel model.User) {
11
12	ctx := context.Background()
13
14	// firebase projectIDは適当でOK
15	store, err := firestore.NewClient(ctx, "testing")
16	if err != nil {
17		log.Fatal(err)
18	}
19	_, _, err = store.Collection("users").Add(ctx, usermodel)
20	if err != nil {
21		log.Fatal(err)
22	}
23}