Xsolla default template currency modification

Yo,
I am sanidhya
I am currently developing a game in ue 4.26.2 that is a multiplayer game and using xsolla services for the networking. I am using the xsolla’s default template which includes half the game I am expecting but I have to modify its in game currency to make an earning source can anyone tell me how do I do it I don’t know much about it pls if anyone knows pls reply to me