Awesome! This question has already 2 answers..
You have basically three options.
You should start using Auth By Login method to use your proxies. Or If you need to use Auth by IP you may use Proxy Router, add profiles into Router and then you should be able to create credentials for router secured by IP. When your IP change you can just create 1 new credentials for router and all proxis willl be working.
If you want to be using your proxies and change whitelisted IP Address every time your dynamic IP change, you can do this with Auth Management.
I tried to create a new proxy without AUTH BY IP, leaving the IP blank, using only with AUTH BY LOGIN, but I was unable to connect.
I was only able to use my Amazon AWS proxy when I created a new one with my current IP.
I didn't understand how to use Auth Management, could you send me a video on youtube or an article explaining better?
Thank you so much!