So currently we are moving from studying on Zoom to some platform called K12Online (not to be confused with K12 because this one is Vietnamese with K12 thing is not). And it doesn't have a fking sign up button. Not on their website nor in the app. There's only the Sign In button, and even that, if you think about creating a new user through the Sign In button like some platforms do, well, you are wrong! It also doesn't work as well!

Nice job, team!