The primary currency of Tatooine (and the Outer Rim in general) was the Wupiupi
Apparently they're still in use by the time of the New Republic and the First Order
“Ha!” Pendewqell yawped. “I imagine you never heard the stories. Old pirates like to tell them after too many drinks in the cantinas. What was the most valuable of prizes during the Clone Wars?”
Reveth shrugged, her red lekku swaying back and forth. “Credits? Pre-Empire would be mostly worthless now…Aurodium?” she mused. “Wupiupi coins?”