func (m *Email) Send(subject, from, body string, to []string) (*rest.Response, error) {
	return m.service.Send(subject, from, body, to)
}
Send will send an email.
package services
import (
	"bytes"
	"html/template"
	"path/filepath"
	"github.com/pkg/errors"
	"github.com/sendgrid/rest"
)
const templatesPath = "../templates/"
var (
	errLoadTemplate = errors.New("Error on load template file")
	errParseTemplate = errors.New("Error on parse template")
)
type EmailClient interface {
	Send(subject, from, body string, to []string) (*rest.Response, error)
}
type EmailResponse struct {
	StatusCode int
	Body       string
}
type Email struct {
	service EmailClient
}
func NewEmail(service EmailClient) *Email {
	return &Email{service: service}
}