forceAliasCreation

This parameter is used only if the phone_number_verified or email_verified attribute is set to True . Otherwise, it is ignored. If this parameter is set to True and the phone number or email address specified in the UserAttributes parameter already exists as an alias with a different user, the API call will migrate the alias from the previous user to the newly created user. The previous user will no longer be able to log in using that alias. If this parameter is set to False , the API throws an AliasExistsException error if the alias already exists. The default value is False .