HTTP 401 Error
The email, URL, and API are not going to work if they are given an invalid key. When that happens, it ends up receiving a 401 error code.
Note that only the OAuth2 requires a Basic Authentication which generates a 401 error. It will not happen for your account, which instead uses a standard login form to let you in.
If you get a 401 error for a page you are sure is not expected to require authentication, let us know by contacting us.
If you already registered with your email address and needed to re-validate (i.e. the first validation somehow failed) then go to the Validate Page where you can request for a new validation code to be emailed to you.
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