> ## Documentation Index
> Fetch the complete documentation index at: https://auth0-docs-event-stream-action-templates.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Type Alias: ScreenIdentifierType

<ParamField body="ScreenIdentifierType" type="&#x22;email&#x22; | &#x22;phone&#x22; | &#x22;username&#x22;">
  Represents the types of user identifiers that can be used during signup.

  * `'email'`: The user will provide an email address.
  * `'phone'`: The user will provide a phone number.
  * `'username'`: The user will choose a username.

  This type is typically used in identity selection or signup flows
  to define which identifiers are enabled and how they behave.

  ```ts Example theme={null}
  const type: IdentifierType = 'email';
  ```
</ParamField>