You said you need this link for a user - customer or shop admin?
If for a customer, then do you reference this link in order notification or somewhere else?
Here is an example for order notifications with metafields for a customer:
Hello, {{ customer.first_name }}
{% if order.metafields.links.invoice.value != blank %}
You can download your invoice here:
DOWNLOAD
{% endif %}
Sometimes .value is not required & haven`t tested it, but you get the idea.
If this is for shop admin, then the small box on the right near the link takes you to the url, so it`s still clickable.