Query users by email address #59
Description
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There's seems to be no way to programmatically query the Auth Users by email address. This means that, in order to know if a user already exists, we have to create the user and wait for an exception to be thrown, which is a complete antipattern for something like this.
Describe the solution you'd like
An addition to the Catalyst API (and related SDKS) to allow us to query a User by their email address.
Describe alternatives you've considered
No alternatives required. Just an addition to the API, please. This should have been there from the start.