We understand how frustrated it feels. Here are a few steps getting you to login successfully.
Check your Email SPAM / JUNK folder: Some email service providers will accidentally classify a normal email as spam. To avoid this, we suggest that you could mark our email address as "Trusted", and/or "Never send to spam" in your email settings.
Wait for a while: I know it sounds unhelpful, but subject to different email service providers, sometimes the email may be delivered with a few minutes delay. Please be patient, wait for a while and check again later.
Contact us: We would be more than happy to assist you! Please send your nickname, registered email address or phone number to us. We will provide you with an alternative way to login as soon as possible.
Set a personal password: To avoid this situation happen again, we suggest that you could set up an account password so that you don't need to wait for the one-time passcode ever again!
More info: How to set up an account password?