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The included changes allow for case insensitive authentication keys. This is implemented as a configuration setting that specifies an array of keys that should be treated as case insensitive. The default is [ :email ].
This means that if a user signs up with [email protected] the user will be able to log in, reset password, unlock account, etc. with any casing of that email address (e.g. [email protected], [email protected]).
This is accomplished by downcasing all authentication keys in the case insensitive keys list upon creating a user and when authentication or finding a user.