You do not need a marriage license to be married biblically. Marriage licenses have only been around for about 100 years. Here is a man who presents both sides of the coin but doesn’t condemn either side.

Is it Biblical to Get Married without a License? – Dr. Roger Barrier

https://www.crosswalk.com/church/pastors-or-leadership/ask-roger/is-it-biblical-to-get-married-without-a-license.html

Will God keep me from heaven if I do not have a marriage license?