Customising Default Double Opt-in EmailMessage

Can I customize Double Optin Email Message?

Actually, I integrated “Integromate” to sync my mailer lite subscribers into GHOST Member. So whenever I get new subscribers in Mailerlite through my facebook group, those subscribers are also getting added as GHOST Member.

Now, these existing subscribers are getting double opt-in email through GHOST which I need to customize it.

How Can I do it?