Create Twilio Account

https://www.twilio.com/docs/messaging/guides/how-to-use-your-free-trial-account

1. SignUp to twilio

2. Create free trial account

3. Send SMS

Example Code

Shell

TWILIO_ACCOUNT_SID="AC2577688bea76dc43fd3abbbc817ab175"
TWILIO_AUTH_TOKEN="b43e41608749480d8af7df2449e7cc04"
TO_NUMBER="[phone]"
FROM_NUMBER="[phone]"
MESSAGE_BODY="hello"

curl -X POST "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_ACCOUNT_SID/Messages.json" \
  --data-urlencode "To=$TO_NUMBER" \
  --data-urlencode "From=$FROM_NUMBER" \
  --data-urlencode "Body=$MESSAGE_BODY" \
  -u "$TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN"

Go

package main

import (
	"encoding/json"
	"fmt"

	"github.com/twilio/twilio-go"
	twilioApi "github.com/twilio/twilio-go/rest/api/v2010"
)

func main() {
	accountSid := "your_account_sid" // Replace with your Account SID
	authToken := "your_auth_token"   // Replace with your Auth Token
	fromNumber := "[phone]"     // Replace with your Twilio Phone Number (with country code)
	toNumber := "[phone]"        // Replace with the recipient's phone number (with country code)
	messageBody := "Hello from Twilio and Go!"

	client := twilio.NewRestClientWithParams(twilio.ClientParams{
		Username: accountSid,
		Password: authToken,
	})

	params := &twilioApi.CreateMessageParams{}
	params.SetFrom(fromNumber)
	params.SetTo(toNumber)
	params.SetBody(messageBody)

	resp, err := client.Api.CreateMessage(params)
	if err != nil {
		fmt.Println("Error sending SMS message: " + err.Error())
	} else {
		response, _ := json.Marshal(*resp)
		fmt.Println("Response: " + string(response))
	}
}