Welcome to RK9 Labs!
We use Google Accounts for authentication, so you'll need to sign in with an email connected to a Google account. If you need to connect your email, this article has instructions on how to use an existing email address.
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Click "Sign in with email" above if you are from Japan, Korea, or APAC and provided your email address to TPCi to login. You will need to click the "Trouble signing in?" to receive an email to reset your password the first time you login.