sending sms to a phone number using gobudgetsms golang library

sms.go

import 	(
  "github.com/souvikhaldar/gobudgetsms"
  "fmt"
)

var smsConfig gobudgetsms.Details
func init() {
	smsConfig = gobudgetsms.SetConfig(BsmsUsername, BsmsUserId, BsmsHandle, "", 1, 0, 0)

}
// sendmessage will send sms using gobudgetsms
func sendmessage(toNumber string, otpMessage string) error{
	message := "Your OTP for xyz is " + otpMessage
	res, err := gobudgetsms.SendSMS(smsConfig, message, toNumber, "xyz")
	if err != nil {
		return err
	}
	fmt.Println("The response after sending sms is ", res)
	return nil
}

if e := sendmessage(phoneNumber, otp); e!= nil{
		c.JSON(500,e.Error())
		return
	}