Auto Contributions to Mutual Funds in ROTH IRA

Contributor
Hi, I set up my USAA investment account to auto contribute to my selected Mutual Funds in my ROTH IRA and IRA. I recently put this on hold due to unexpected expenses and I remember hearing that USAA members could turn this on or off without having to call in and speak with a representative - can you advise me on this? is there such a function?