Is it possible to check if the user/email already exists

[mschewe]

I would like to have a two step sign-up. First the user should enter it's E-Mail. If the E-Mail is already known, the user should be asked for his password. If the user is unknown, it should show the password and password_confirmation field. Is this possible?

The only way I found is to use a wrong password and then catch the error:

userPool.signUp('email@example.com', 'veryunlikelypassword');
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ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: CognitoClientException{statusCode: 400, code: UsernameExistsException, name: UsernameExistsException, message: An account with the given email already exists.

But this doesn't seem right. Is there an alternative?

EDIT: Stupid from my side. That would register the user with that password 🤦‍♂️