Test strategy for 2 player game

i built the tic tac toe online version, and wanna share the game link in dev env (not published) with my another google test account (same laptop but different chrome session). I created the link and u can see it’s the dev studio’s URL, when it send to my another google acc, it reflect error (#2 in screenshot). I guess it’s trying to protect from non-developer to see my project.


How can i proceed with the test without publish to production?

Have you tried this?