Mint Native Currency For Substrate

I am using substrate contracts node as my local blockchain as I have requirement of contract interaction, but as I see there are list of accounts like Alice, Bob, Bob_Stash and each account has balance which is treated as currency for this local blockchain.
But how do I get ,more of this currency I am guessing I need some config which would mint these native currency tokens. Please help if anyone has worked on something like this?

better place to ask would be