'(aws-amplify / cognito) first name, last name and date of birth attributes to check if an account is associated with given values

By using Angular and aws-amplify, would it be possible to poll for an existing account in cognito if the only attribute that I am capturing are first name, last name and date of birth? This will pretty much void auth in a way.

Please note: Our application does not allow any new library to be imported. We are working with what we have.

Solution 1:^[1]

Certainly it is possible to write a piece of code which queries user pool and informs if there is a match.

Alternative 1: Enable Amplify AdminQueries API and use listUsers to retrieve users. Command syntax allows using AttributesToGet and Filter to modify the query.

{
   "AttributesToGet": [ "string" ],
   "Filter": "string",
   "Limit": number,
   "PaginationToken": "string",
   "UserPoolId": "string"
}

Alternative 2: If possible, use Cognito API directly. @aws-sdk/client-cognito-identity-provider has the class ListUsersCommand. Its interface ListUsersCommandInput has properties AttributesToGet and Filter which can be used to fetch desired results.

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Solution 1

'(aws-amplify / cognito) first name, last name and date of birth attributes to check if an account is associated with given values

Solution 1:[1]

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Solution 1:^[1]