I'm assuming you're asking about removing yourself from an entire HIpChat Cloud instance - i.e. deleting the account associated with your email address. Head over to https://www.hipchat.com/account/delete - you'll sign in with the email address and password for the team you joined by mistake.
The web interface will require you to type your password again to confirm you really want to delete your account.
After that, you're free to join the team you meant to join with your email address.
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Heya, Hipchat friends! We’re so happy you’re checking out Stride. Whether you know it or not, you have been instrumental in making Stride come to life. Every feature, design, and functionality...
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