I thought pre-mined coins was hardcoded on the first blocks, and these are introduced before any mining has even begun.
Didn't know that coins started with a kind of private mining are called "Pre-mine coin".
Toklio source was available on git to everyone since 26 april 2018 (blockchain starts on 27 april 2018) .
Whether that happened "private" over 2 months or was done with the first block doesn't matter. In the end it's still a pre-mine until you had a public announcement.
I'd suggest you change the pre-mine to 8% because that's more accurate to what you're holding.
Beside that a good looking project.