Cognito use either email or phone number as username - amazon-web-services

Question

I have this SAM template:
AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31
Description: >
Passwordless SMS authentication backend using Amazon Cognito User Pools CUSTOM AUTH challenge flow w/ AWS Lambda triggers and Amazon SNS for sending SMS TOTP
Metadata:
AWS::ServerlessRepo::Application:
Name: passwordless-sms-email-auth
Description: >
Passwordless SMS authentication backend using Amazon Cognito User Pools CUSTOM AUTH challenge flow w/ AWS Lambda triggers and Amazon SNS for sending SMS TOTP
SpdxLicenseId: MIT
LicenseUrl: LICENSE
Labels: ['passwordless', 'authentication', 'cognito', 'auth', 'sms', 'iOS', 'mobile', 'pinpoint', 'serverless', 'amplify']
SemanticVersion: 1.14.20
Globals:
Function:
Timeout: 3
Parameters:
UserPoolName:
Type: String
Description: The name you want the User Pool to be created with
Default: rafaelTest
Resources:
UserPool:
Type: "AWS::Cognito::UserPool"
Properties:
UserPoolName: !Ref UserPoolName
Schema:
- Name: name
AttributeDataType: String
Mutable: true
Required: true
- Name: phone_number
AttributeDataType: String
Mutable: true
Required: false
- Name: email
AttributeDataType: String
Mutable: true
Required: false
Policies:
PasswordPolicy:
MinimumLength: 6
RequireLowercase: false
RequireNumbers: false
RequireSymbols: false
RequireUppercase: false
UsernameAttributes:
- phone_number
- email
MfaConfiguration: "OFF"
LambdaConfig:
CreateAuthChallenge: !GetAtt CreateAuthChallenge.Arn
DefineAuthChallenge: !GetAtt DefineAuthChallenge.Arn
PreSignUp: !GetAtt PreSignUp.Arn
VerifyAuthChallengeResponse: !GetAtt VerifyAuthChallengeResponse.Arn
UserPoolClient:
Type: "AWS::Cognito::UserPoolClient"
Properties:
ClientName: sms-auth-client
GenerateSecret: false
UserPoolId: !Ref UserPool
ExplicitAuthFlows:
- CUSTOM_AUTH_FLOW_ONLY
Outputs:
UserPoolId:
Description: ID of the User Pool
Value: !Ref UserPool
UserPoolClientId:
Description: ID of the User Pool Client
Value: !Ref UserPoolClient
When creating the userpool, I wanted users to be able to use either just their email or just their phone as their username.
This way it is done, I always need to send both email and phone number.
Does anyone know how I solve this?
I want users to be able to log in by putting one of the following information:
email + name
phone number + name
Anyone help me?

Answer 1

Users can login with their email or phone number, using this SAM template and use a random uuid as username when sign up.
UserPool:
Type: "AWS::Cognito::UserPool"
Properties:
UserPoolName: !Ref UserPoolName
Schema:
- Name: phone_number
AttributeDataType: String
Mutable: true
- Name: email
AttributeDataType: String
Mutable: true
Policies:
PasswordPolicy:
MinimumLength: 6
RequireLowercase: false
RequireNumbers: false
RequireSymbols: false
RequireUppercase: false
AliasAttributes:
- email
- phone_number
MfaConfiguration: "OFF"
But now I need to know with alias users use on sign in, anyone know how?
i'm doing a passwordless flow with cognito and the event on create-auth-lambda triggers is always the same.