const auth = new AuthenticationClient({
  domain: '<DOMAIN>,
  clientId: '<CLIENT_ID>',
  clientSecret: '<CLIENT_SECRET>',
});

// Create Connection with unique email identifier as false. Defines whether the email attribute can be used as a primary identifier. Must be set to false when unique = false.

  const createConnectionPayload: ConnectionCreate = {
      name: "non-unique-test-2",
      strategy: "auth0",
      options: {
        attributes: {
          email: {
            unique: false,
            identifier: { active: false }
          },
          username: {
            identifier: { active: true }
          }
        }
      }
  }

  const createConnection = await auth0.connections.create(createConnectionPayload);
  console.log("createConnection", createConnection);