1 inch integration

Hi, where can I get help with 1inch dex integration with my website?

I try to understand approval of spending tokens, do my website need to get permission from user which wants to swap tokens? Or my website should get his permission for your dex address, like the one i get from api:
0x11111112542d85b3ef69ae05771c2dccff4faa26 but idk how to get this permission then from metamask, it always ask for permission for my website, your help would be very much appreciated bacause i cannot find it in docs

Regards!
Mario

I see that developer support is dead on 1inch