SQLiteUser

var err error
var user dataFormat.User
var userAsByte []byte

var sqlUser = SQLiteUser{}
err = sqlUser.Connect(consts.KDatabaseName)
if err != nil {
	log.Fatalf("sqlUser.Connect().error: %v", err.Error())
}

err = sqlUser.Install()
if err != nil {
	log.Fatalf("sqlUser.Install().error: %v", err.Error())
}

var found bool
found, err = sqlUser.MailExists("helmut.kemper@gmail.com")
if err != nil {
	log.Fatalf("sqlUser.MailExists().error: %v", err.Error())
}

if found == false {
	log.Fatal("sqlUser.MailExists().found: false")
}

user, err = sqlUser.GetByEmail("helmut.kemper@gmail.com")
if err != nil {
	log.Fatalf("sqlUser.GetMainMenu().error: %v", err.Error())
}

userAsByte, err = json.Marshal(&user)
if err != nil {
	log.Fatalf("json.Marshal().error: %v", err.Error())
}

fmt.Printf("%s", userAsByte)

err = os.Remove(consts.KDatabaseName)
if err != nil {
	log.Fatalf("os.Remove().error: %v", err.Error())
}

Output:
{"id":"24867707-3a21-4368-8058-3d7b1ddb8c06","manuId":"5996b891-9d3c-4038-af37-cb07f5f0f72d","admin":1,"name":"Helmut Kemper","nickname":"Kemper","mail":"helmut.kemper@gmail.com"}