Shadowsocks needs numerical IP address?

Hi I’m trying to connect to the shadowsocks server provided by my VPN provider. My GL-MT300A router will only allow numbers to be inputted instead of the actual address ( which is provided by my VPN provider that I’m supposed to use. It works on my phone but the app I use allows me to input characters other than numbers. Is there a workaround for this? Thanks for the help!

router model: GL-MT300A

firmware version: 2.264


not sure, but it is better to use real IP addresses.

Yes, it needs ip address, not url.