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Sending a magic link via text

I’d like to send someone a text that with a link to my site that will log them in. And I’d like the link to expire after a certain amount of time. It seems like this is pretty much the same as the magic link that gets sent via the password less email flow, but I want to do it via text.
I’ve seen some conversation around similar goals on here, but I’m still struggling to figure out my exact use case.
Does anyone know a good way to accomplish this?

Just to be clear I don’t want the user to have to request this link. I want to send it to them based on a server-side trigger.