In recent years, developers have created tools that exploit a vulnerability in MediaTek’s BootROM to bypass authentication entirely without an auth file. The most famous is (by Xyzzy and others).
If you're looking to bypass the "Status Sec Auth File Needed" error while flashing your MediaTek device, here are a few options for the (Helio G90 series). Option 1: Use an Auth Bypass Tool (Recommended)