Before you start

The Experience supports Passwordless connections, which allow users to provide a phone number or email address, and then receive a one-time password (OTP) to complete authentication.

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Enable Passwordless for Universal Login

To configure Universal Login to support connections, you’ll need to set the Authentication Profile to use a supported login flow, and update your application to specify the connection during authentication.

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Enable Identifier First

In the , go to Authentication > Authentication Profile. Select either Identifier First or Identifier First + Biometrics.

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Update your application

Depending on the type of connections you have enabled for your application, you may need to update your application to specify a Passwordless connection during login:
Database connectionPasswordless connectionNeed to specify?User experience
YesSMS and/or EmailYesSpecified Passwordless connection is presented during login.
NoSMS and EmailNoPasswordless connection that was created first is presented.
NoSMS or EmailNoPasswordless connection is presented (along with any enabled Social connections) during login.
To specify a Passwordless connection during login, you must pass the connection parameter and its value (either sms or email) to the Auth0 Authentication API Login endpoint: https://mytenant.us.auth0.com/authorize?client_id={id}&``connection={sms|email}``&scope=…&response_type=code&response_mode=query&state=…&redirect_uri=http%3A%2F%2Flocalhost%3A3000&code_challenge=… If you are using one of our SDKs, you can specify a Passwordless connection during initialization. For example: 
auth0 = await createAuth0Client({
     domain: config.domain,
     client_id: config.clientId,
     connection: "email"
  });

auth0 = await createAuth0Client({
     domain: config.domain,
     client_id: config.clientId,
     connection: "sms"
  });
If you are using Passwordless with Universal Login and Single Sign-On, connection parameters sms and email do not utilize the existing Auth0 session, and the user will be prompted to log in.

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Test the connection

When the user is prompted to enter their OTP, they’ll see one of the following screens:

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Signup

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Login