add user and password hash

Makefile

@@ -9,9 +9,8 @@ migratedown:
 mock-generate: 
 	mockgen -package mockdb -destination db/mock/store.go git.nochill.in/nochill/naice_pos/db/sqlc Store
 
-
 sqlc:
-	sqlc generate
+	sqlc generate && make mock-generate
 
 test:
 	go test -v -cover ./...

api/product_test.go

@@ -109,7 +109,7 @@ func TestGetProductApi(t *testing.T) {
 func randomProduct() db.Product {
 	return db.Product{
 		ID:            uuid.New(),
-		MerchantID:    uuid.MustParse("d9b0e126-991e-46ac-8c61-5efdd605f75d"),
+		MerchantID:    uuid.MustParse("a848090f-0409-4386-9caa-929ae6874dbb"),
 		Name:          util.RandomString(5),
 		SellingPrice:  util.RandomFloat(1000, 99999),
 		PurchasePrice: util.RandomFloat(999, 9999),

api/server.go

@@ -14,6 +14,7 @@ func NewServer(store db.Store) *Server {
 	server := &Server{store: store}
 	router := gin.Default()
 
+	router.POST("/merchants", server.createUser)
 	router.POST("/products", server.createProduct)
 	router.PATCH("/products", server.updateProduct)
 	router.GET("/product/:id", server.getProduct)

api/user.go

@@ -0,0 +1,69 @@
+package api
+
+import (
+	"database/sql"
+	"net/http"
+
+	db "git.nochill.in/nochill/naice_pos/db/sqlc"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"github.com/lib/pq"
+)
+
+type createUserRequest struct {
+	Email      string `json:"email" binding:"required,email"`
+	Fullname   string `json:"fullname" binding:"required"`
+	Password   string `json:"password" binding:"required"`
+	OutletName string `json:"outlet_name" binding:"required"`
+}
+
+type createUserResponse struct {
+	ID        uuid.UUID    `json:"id"`
+	IndexID   int64        `json:"index_id"`
+	Email     string       `json:"email"`
+	Fullname  string       `json:"fullname"`
+	CreatedAt sql.NullTime `json:"created_at"`
+	UpdatedAt sql.NullTime `json:"updated_at"`
+	Outlet    db.Merchant  `json:"outlet"`
+}
+
+func (server *Server) createUser(ctx *gin.Context) {
+	var req createUserRequest
+
+	if err := ctx.ShouldBindJSON(&req); err != nil {
+		ctx.JSON(http.StatusBadRequest, errorResponse(err))
+		return
+	}
+
+	arg := db.UserMerchantTxParams{
+		Email:      req.Email,
+		Fullname:   req.Fullname,
+		Password:   req.Password,
+		OutletName: req.OutletName,
+	}
+
+	user, err := server.store.CreateUserMerchantTx(ctx, arg)
+	if err != nil {
+		if pqErr, ok := err.(*pq.Error); ok {
+			switch pqErr.Code.Name() {
+			case "foreign_key_violation", "unique_violation":
+				ctx.JSON(http.StatusConflict, errorResponse(err))
+				return
+			}
+		}
+		ctx.JSON(http.StatusInternalServerError, errorResponse(err))
+		return
+	}
+
+	res := createUserResponse{
+		ID:        user.OwnerProfile.ID,
+		IndexID:   user.OwnerProfile.IndexID,
+		Email:     user.OwnerProfile.Email,
+		Fullname:  user.OwnerProfile.Fullname,
+		CreatedAt: sql.NullTime{Valid: true, Time: user.OutletProfile.CreatedAt.Time},
+		UpdatedAt: sql.NullTime{Valid: true, Time: user.OutletProfile.UpdatedAt.Time},
+		Outlet:    user.OutletProfile,
+	}
+
+	ctx.JSON(http.StatusOK, res)
+}

api/user_test.go

@@ -0,0 +1 @@
+package api

db/migrations/000001_init_schema.up.sql

@@ -3,7 +3,7 @@ CREATE TABLE users(
     "index_id" bigserial not null,
     "email" varchar unique not null,
     "password" varchar not null,
-    "fullname" varchar,
+    "fullname" varchar not null,
     "created_at" timestamp default(now()),
     "updated_at" timestamp default(now())
 );

db/mock/store.go

@@ -51,6 +51,21 @@ func (mr *MockStoreMockRecorder) CreateCustomers(arg0, arg1 interface{}) *gomock
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CreateCustomers", reflect.TypeOf((*MockStore)(nil).CreateCustomers), arg0, arg1)
 }
 
+// CreateMerchant mocks base method.
+func (m *MockStore) CreateMerchant(arg0 context.Context, arg1 db.CreateMerchantParams) (db.Merchant, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CreateMerchant", arg0, arg1)
+	ret0, _ := ret[0].(db.Merchant)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// CreateMerchant indicates an expected call of CreateMerchant.
+func (mr *MockStoreMockRecorder) CreateMerchant(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CreateMerchant", reflect.TypeOf((*MockStore)(nil).CreateMerchant), arg0, arg1)
+}
+
 // CreateProduct mocks base method.
 func (m *MockStore) CreateProduct(arg0 context.Context, arg1 db.CreateProductParams) (db.Product, error) {
 	m.ctrl.T.Helper()
@@ -111,6 +126,36 @@ func (mr *MockStoreMockRecorder) CreateSuppliers(arg0, arg1 interface{}) *gomock
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CreateSuppliers", reflect.TypeOf((*MockStore)(nil).CreateSuppliers), arg0, arg1)
 }
 
+// CreateUser mocks base method.
+func (m *MockStore) CreateUser(arg0 context.Context, arg1 db.CreateUserParams) (db.User, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CreateUser", arg0, arg1)
+	ret0, _ := ret[0].(db.User)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// CreateUser indicates an expected call of CreateUser.
+func (mr *MockStoreMockRecorder) CreateUser(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CreateUser", reflect.TypeOf((*MockStore)(nil).CreateUser), arg0, arg1)
+}
+
+// CreateUserMerchantTx mocks base method.
+func (m *MockStore) CreateUserMerchantTx(arg0 context.Context, arg1 db.UserMerchantTxParams) (db.UserMerchantTxResult, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CreateUserMerchantTx", arg0, arg1)
+	ret0, _ := ret[0].(db.UserMerchantTxResult)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// CreateUserMerchantTx indicates an expected call of CreateUserMerchantTx.
+func (mr *MockStoreMockRecorder) CreateUserMerchantTx(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CreateUserMerchantTx", reflect.TypeOf((*MockStore)(nil).CreateUserMerchantTx), arg0, arg1)
+}
+
 // CustomersList mocks base method.
 func (m *MockStore) CustomersList(arg0 context.Context, arg1 db.CustomersListParams) ([]db.Customer, error) {
 	m.ctrl.T.Helper()
@@ -198,6 +243,21 @@ func (mr *MockStoreMockRecorder) GetMerchantByUserId(arg0, arg1 interface{}) *go
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetMerchantByUserId", reflect.TypeOf((*MockStore)(nil).GetMerchantByUserId), arg0, arg1)
 }
 
+// GetPasswordByEmail mocks base method.
+func (m *MockStore) GetPasswordByEmail(arg0 context.Context, arg1 string) (string, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetPasswordByEmail", arg0, arg1)
+	ret0, _ := ret[0].(string)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetPasswordByEmail indicates an expected call of GetPasswordByEmail.
+func (mr *MockStoreMockRecorder) GetPasswordByEmail(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetPasswordByEmail", reflect.TypeOf((*MockStore)(nil).GetPasswordByEmail), arg0, arg1)
+}
+
 // GetProduct mocks base method.
 func (m *MockStore) GetProduct(arg0 context.Context, arg1 uuid.UUID) (db.Product, error) {
 	m.ctrl.T.Helper()
@@ -228,6 +288,21 @@ func (mr *MockStoreMockRecorder) GetStockForUpdateStock(arg0, arg1 interface{})
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetStockForUpdateStock", reflect.TypeOf((*MockStore)(nil).GetStockForUpdateStock), arg0, arg1)
 }
 
+// GetUserById mocks base method.
+func (m *MockStore) GetUserById(arg0 context.Context, arg1 uuid.UUID) (db.User, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetUserById", arg0, arg1)
+	ret0, _ := ret[0].(db.User)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetUserById indicates an expected call of GetUserById.
+func (mr *MockStoreMockRecorder) GetUserById(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetUserById", reflect.TypeOf((*MockStore)(nil).GetUserById), arg0, arg1)
+}
+
 // ListProducts mocks base method.
 func (m *MockStore) ListProducts(arg0 context.Context, arg1 db.ListProductsParams) ([]db.Product, error) {
 	m.ctrl.T.Helper()

db/query/merchants.sql

@@ -1,3 +1,8 @@
+-- name: CreateMerchant :one
+INSERT INTO merchants (name,owner_id) 
+VALUES ($1, $2)
+RETURNING *;
+
 -- name: GetMerchantById :one
 SELECT * FROM merchants
 WHERE id = $1;

db/query/users.sql

@@ -9,11 +9,9 @@ RETURNING *;
 -- name: GetPasswordByEmail :one
 SELECT password
 FROM users
-WHERE email = $1
-RETURNING password;
+WHERE email = $1;
 
 -- name: GetUserById :one
 SELECT *
 FROM users
-WHERE id = $1
-RETURNING *;
+WHERE id = $1;

db/sqlc/merchants.sql.go

@@ -1,7 +1,7 @@
 // Code generated by sqlc. DO NOT EDIT.
 // versions:
 //   sqlc v1.17.2
-// source: merchant.sql
+// source: merchants.sql
 
 package db
 
@@ -11,6 +11,31 @@ import (
 	"github.com/google/uuid"
 )
 
+const createMerchant = `-- name: CreateMerchant :one
+INSERT INTO merchants (name,owner_id) 
+VALUES ($1, $2)
+RETURNING id, index_id, name, owner_id, created_at, updated_at
+`
+
+type CreateMerchantParams struct {
+	Name    string    `json:"name"`
+	OwnerID uuid.UUID `json:"owner_id"`
+}
+
+func (q *Queries) CreateMerchant(ctx context.Context, arg CreateMerchantParams) (Merchant, error) {
+	row := q.db.QueryRowContext(ctx, createMerchant, arg.Name, arg.OwnerID)
+	var i Merchant
+	err := row.Scan(
+		&i.ID,
+		&i.IndexID,
+		&i.Name,
+		&i.OwnerID,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
 const getMerchantById = `-- name: GetMerchantById :one
 SELECT id, index_id, name, owner_id, created_at, updated_at FROM merchants
 WHERE id = $1

db/sqlc/merchants_test.go

@@ -0,0 +1 @@
+package db

db/sqlc/models.go

@@ -110,11 +110,11 @@ type Supplier struct {
 }
 
 type User struct {
-	ID        uuid.UUID      `json:"id"`
-	IndexID   int64          `json:"index_id"`
-	Email     string         `json:"email"`
-	Password  string         `json:"password"`
-	Fullname  sql.NullString `json:"fullname"`
-	CreatedAt sql.NullTime   `json:"created_at"`
-	UpdatedAt sql.NullTime   `json:"updated_at"`
+	ID        uuid.UUID    `json:"id"`
+	IndexID   int64        `json:"index_id"`
+	Email     string       `json:"email"`
+	Password  string       `json:"password"`
+	Fullname  string       `json:"fullname"`
+	CreatedAt sql.NullTime `json:"created_at"`
+	UpdatedAt sql.NullTime `json:"updated_at"`
 }

db/sqlc/products_test.go

@@ -18,7 +18,7 @@ func createRandomProduct(t *testing.T) (Product, CreateProductParams) {
 	stock := util.RandomFloat(10, 10000)
 
 	arg := CreateProductParams{
-		MerchantID:    uuid.MustParse("d9b0e126-991e-46ac-8c61-5efdd605f75d"),
+		MerchantID:    uuid.MustParse("a848090f-0409-4386-9caa-929ae6874dbb"),
 		Name:          util.RandomString(10),
 		SellingPrice:  sellingPrice,
 		PurchasePrice: purchasePrice,

db/sqlc/querier.go

@@ -12,18 +12,22 @@ import (
 
 type Querier interface {
 	CreateCustomers(ctx context.Context, arg CreateCustomersParams) (Customer, error)
+	CreateMerchant(ctx context.Context, arg CreateMerchantParams) (Merchant, error)
 	CreateProduct(ctx context.Context, arg CreateProductParams) (Product, error)
 	CreatePurchaseOrder(ctx context.Context, arg CreatePurchaseOrderParams) (PurchaseOrder, error)
 	CreatePurchaseOrderDetail(ctx context.Context, arg CreatePurchaseOrderDetailParams) (PurchaseOrderDetail, error)
 	CreateSuppliers(ctx context.Context, arg CreateSuppliersParams) (Supplier, error)
+	CreateUser(ctx context.Context, arg CreateUserParams) (User, error)
 	CustomersList(ctx context.Context, arg CustomersListParams) ([]Customer, error)
 	DeleteCustomer(ctx context.Context, id uuid.UUID) error
 	DeleteProduct(ctx context.Context, id uuid.UUID) error
 	DeleteSupplier(ctx context.Context, id uuid.UUID) error
 	GetMerchantById(ctx context.Context, id uuid.UUID) (Merchant, error)
 	GetMerchantByUserId(ctx context.Context, ownerID uuid.UUID) (Merchant, error)
+	GetPasswordByEmail(ctx context.Context, email string) (string, error)
 	GetProduct(ctx context.Context, id uuid.UUID) (Product, error)
 	GetStockForUpdateStock(ctx context.Context, id uuid.UUID) (Product, error)
+	GetUserById(ctx context.Context, id uuid.UUID) (User, error)
 	ListProducts(ctx context.Context, arg ListProductsParams) ([]Product, error)
 	SuppliersList(ctx context.Context, arg SuppliersListParams) ([]Supplier, error)
 	UpdateCustomer(ctx context.Context, id uuid.UUID) (Customer, error)

db/sqlc/store.go

@@ -11,6 +11,7 @@ import (
 type Store interface {
 	Querier
 	PurchaseOrderTx(ctx context.Context, arg PurchasoOrderTxParams) (PurchaseOrderTxResult, error)
+	CreateUserMerchantTx(ctx context.Context, arg UserMerchantTxParams) (UserMerchantTxResult, error)
 }
 
 type SQLStore struct {
@@ -126,3 +127,46 @@ func (store *SQLStore) PurchaseOrderTx(ctx context.Context, arg PurchasoOrderTxP
 
 	return result, err
 }
+
+type UserMerchantTxParams struct {
+	Email      string `json:"email"`
+	Fullname   string `json:"fullname"`
+	Password   string `json:"password"`
+	OutletName string `json:"outlet_name"`
+}
+
+type UserMerchantTxResult struct {
+	OwnerProfile  User     `json:"owner_profile"`
+	OutletProfile Merchant `json:"outlet_profile"`
+}
+
+func (store *SQLStore) CreateUserMerchantTx(ctx context.Context, arg UserMerchantTxParams) (UserMerchantTxResult, error) {
+	var result UserMerchantTxResult
+	err := store.execTx(ctx, func(q *Queries) error {
+		var err error
+
+		result.OwnerProfile, err = q.CreateUser(ctx, CreateUserParams{
+			Email:    arg.Email,
+			Password: arg.Password,
+			Fullname: arg.Fullname,
+		})
+
+		if err != nil {
+			return err
+		}
+
+		result.OutletProfile, err = q.CreateMerchant(ctx, CreateMerchantParams{
+			Name:    arg.OutletName,
+			OwnerID: result.OwnerProfile.ID,
+		})
+
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+
+	return result, err
+
+}

db/sqlc/store_test.go

@@ -44,7 +44,9 @@ func TestPurchaseOrder(t *testing.T) {
 
 	products = append(products, purchaseProducts_1, purchaseProducts_2)
 
-	for i := 0; i < 5; i++ {
+	tries := 3
+
+	for i := 0; i < tries; i++ {
 		go func() {
 			result, err := store.PurchaseOrderTx(context.Background(), PurchasoOrderTxParams{
 				MerchantID:  supplier.MerchantID,
@@ -61,7 +63,7 @@ func TestPurchaseOrder(t *testing.T) {
 		}()
 	}
 
-	for i := 0; i < 5; i++ {
+	for i := 0; i < tries; i++ {
 		err := <-errs
 		require.NoError(t, err)
 
@@ -75,3 +77,38 @@ func TestPurchaseOrder(t *testing.T) {
 		require.NotZero(t, purchaseOrder.PaidNominal, product1.PurchasePrice+product2.PurchasePrice)
 	}
 }
+
+func TestCreateUserMerchant(t *testing.T) {
+	store := NewStore(testDB)
+
+	errs := make(chan error)
+	results := make(chan UserMerchantTxResult)
+
+	tries := 3
+
+	for i := 0; i < tries; i++ {
+		randString := util.RandomString(10)
+		password, err := util.HashPassword(randString)
+		require.NoError(t, err)
+
+		go func() {
+			result, err := store.CreateUserMerchantTx(context.Background(), UserMerchantTxParams{
+				Email:      util.RandomEmail(),
+				Fullname:   util.RandomString(6),
+				Password:   password,
+				OutletName: util.RandomString(6),
+			})
+			errs <- err
+			results <- result
+		}()
+	}
+
+	for i := 0; i < tries; i++ {
+		err := <-errs
+		require.NoError(t, err)
+
+		result := <-results
+		require.NotEmpty(t, result)
+	}
+
+}

db/sqlc/suppliers_test.go

@@ -11,7 +11,7 @@ import (
 
 func createRandomSupplier(t *testing.T) (Supplier, CreateSuppliersParams) {
 	arg := CreateSuppliersParams{
-		MerchantID: uuid.MustParse("d9b0e126-991e-46ac-8c61-5efdd605f75d"),
+		MerchantID: uuid.MustParse("a848090f-0409-4386-9caa-929ae6874dbb"),
 		Name:       util.RandomString(10),
 	}
 

db/sqlc/users.sql.go

@@ -0,0 +1,76 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.17.2
+// source: users.sql
+
+package db
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+)
+
+const createUser = `-- name: CreateUser :one
+INSERT INTO users (
+  email,
+  password,
+  fullname
+) VALUES ($1, $2, $3)
+RETURNING id, index_id, email, password, fullname, created_at, updated_at
+`
+
+type CreateUserParams struct {
+	Email    string `json:"email"`
+	Password string `json:"password"`
+	Fullname string `json:"fullname"`
+}
+
+func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (User, error) {
+	row := q.db.QueryRowContext(ctx, createUser, arg.Email, arg.Password, arg.Fullname)
+	var i User
+	err := row.Scan(
+		&i.ID,
+		&i.IndexID,
+		&i.Email,
+		&i.Password,
+		&i.Fullname,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}
+
+const getPasswordByEmail = `-- name: GetPasswordByEmail :one
+SELECT password
+FROM users
+WHERE email = $1
+`
+
+func (q *Queries) GetPasswordByEmail(ctx context.Context, email string) (string, error) {
+	row := q.db.QueryRowContext(ctx, getPasswordByEmail, email)
+	var password string
+	err := row.Scan(&password)
+	return password, err
+}
+
+const getUserById = `-- name: GetUserById :one
+SELECT id, index_id, email, password, fullname, created_at, updated_at
+FROM users
+WHERE id = $1
+`
+
+func (q *Queries) GetUserById(ctx context.Context, id uuid.UUID) (User, error) {
+	row := q.db.QueryRowContext(ctx, getUserById, id)
+	var i User
+	err := row.Scan(
+		&i.ID,
+		&i.IndexID,
+		&i.Email,
+		&i.Password,
+		&i.Fullname,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}

db/sqlc/users_test.go

@@ -0,0 +1,7 @@
+package db
+
+import "testing"
+
+func TestGetUserByID(t *testing.T) {
+
+}

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/spf13/viper v1.15.0
 	github.com/stretchr/testify v1.8.2
 	github.com/tabbed/pqtype v0.1.1
+	golang.org/x/crypto v0.7.0
 )
 
 require (
@@ -42,7 +43,6 @@ require (
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.10 // indirect
 	golang.org/x/arch v0.3.0 // indirect
-	golang.org/x/crypto v0.7.0 // indirect
 	golang.org/x/net v0.8.0 // indirect
 	golang.org/x/sys v0.6.0 // indirect
 	golang.org/x/text v0.8.0 // indirect

util/password.go

@@ -0,0 +1,19 @@
+package util
+
+import (
+	"fmt"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+func HashPassword(password string) (string, error) {
+	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return "", fmt.Errorf("Failed to hash password: %w", err)
+	}
+	return string(hashedPassword), nil
+}
+
+func CheckPassword(password string, hashedPassword string) error {
+	return bcrypt.CompareHashAndPassword([]byte(hashedPassword), []byte(password))
+}

util/password_test.go

@@ -0,0 +1,23 @@
+package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"golang.org/x/crypto/bcrypt"
+)
+
+func TestPasswordUtil(t *testing.T) {
+	password := RandomString(10)
+
+	hashedPassword, err := HashPassword(password)
+	require.NoError(t, err)
+	require.NotEmpty(t, hashedPassword)
+
+	err = CheckPassword(password, hashedPassword)
+	require.NoError(t, err)
+
+	wrongPassword := RandomString(5)
+	err = CheckPassword(wrongPassword, hashedPassword)
+	require.EqualError(t, err, bcrypt.ErrMismatchedHashAndPassword.Error())
+}

util/random.go

@@ -1,6 +1,7 @@
 package util
 
 import (
+	"fmt"
 	"math/rand"
 	"strings"
 	"time"
@@ -38,3 +39,7 @@ func RandomString(n int) string {
 
 	return sb.String()
 }
+
+func RandomEmail() string {
+	return fmt.Sprintf("%s@mail.com", RandomString(5))
+}