confirmRegistration isn't compatible with e-mail aliases

[orasis]

I created a user pool using the e-mail as an alias and an automatically generate user name. The user is to never see their user name and only log in with their e-mail address. When attempting to call confirmRegistration, it fails since the true username is not known in order to construct the CognitoUser object.

It should be possible to construct a CognitoUser object using only the aliased e-mail address and perform confirmation with that object.

We need to use e-mail addresses as aliases, because these are corporate accounts where the employee managing the account may change, thus the e-mail address must be changeable while keeping the same sub.

[itrestian]

This is related to #147

Currently Amazon Cognito does not support providing aliases in the confirmRegistration API. However, we have a roadmap item to be able to use aliases in certain APIs. I will add this request as a +1 to that issue.

[jogold]

Hi @itrestian,

Is it still the case? From the doc:

You can use an email address or phone number as an alias in place of the username in all APIs except the ListUsers API. When you call ListUsers, you can search by the email or phone_number attribute; if you search by username, you must supply the actual username, not an alias.

Or is this paragraph taken from http://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-settings-attributes.html#user-pool-settings-aliases only valid for option 2?

Shouldn't the doc at http://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_Operations.html be updated?

Thank you