Authentication using phone number only

[itaisteinherz]

State your question

I need to authenticate and allow users to login to my app using their phone number only, by confirming it (using a one-time password sent using SMS) on registration and on every login.

How could one go about implementing this?
I already tried using the default Amplify CLI wizard, but the login screen it generated always required me to use a username/email address as the primary identification field.

Which AWS Services are you utilizing?

• AWS Cognito
• AWS S3
• AWS DynamoDB
• AWS AppSync

Environment (please complete the following information):

• SDK Version: 1.6.5 (found using $ amplify --version)

Device Information (please complete the following information):

• Device: Samsung Galaxy S5
• Android Version: Marshmallow 6.0.1
• Specific to simulators: No

// cc @ofirsteinherz @undefobj

[undefobj]

@itaisteinherz We chatted about this internally and here is the status:

• If you want to just use a phone number AS the username, just select that option and use the phone number for the input field. You might have to build out your UI with AWSMobileClient rather than using drop-in auth but it's doable
• If you want an "Alternative SignIn" option, meaning "just select the standard “username only” and use a phone number (to sign in) as well”, then it is not supported by the CLI

For the second one we'd need to do something like this: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cognito-userpool.html#cfn-cognito-userpool-aliasattributes

If that's what you're looking for then let's open up an issue in the CLI repo as a feature request.

[itaisteinherz]

@undefobj If I understood you correctly, what I'm looking for is the second option. I'll open an issue over at the CLI repo.

[itaisteinherz]

Moved to aws-amplify/amplify-cli#1723.