Yes, you can. Keep in mind, cash advances are subject to a 5% charge or $10 minimum fee for each transaction, plus any ATM fees, and are subject to a higher interest rate than your standard APR. There is a minimum withdrawal amount of $40, as well as a daily limit of $1000 per day. Your total cash limit, including fees, is 30% of your total credit line.
Please do check out SoFi Money as a lower-cost option to withdraw cash!