Since you can no longer buy it directly from digital stores, your safe options are:

Instead of damaging your files, some malware uses your computer’s GPU (graphics card) to mine cryptocurrency in the background. You will notice that your PC runs slow, the fan spins loudly, and your electricity bill increases—all while you are still not playing FIFA 19.

: Modern games like FIFA 19 use sophisticated digital rights management (DRM) and require unique, one-time-use keys tied to an official account (like EA/Origin). A static text file found online is almost guaranteed to be invalid. How to Officially Activate FIFA 19 on PC