> ## Documentation Index
> Fetch the complete documentation index at: https://stytch.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Email OTP Login or Signup

> Login or signup using email OTPs with the Stytch Vanilla JS SDK

export const organization = "Represents an instance or tenant in your application, typically mapping to each of your top-level customers.";

export const member = "Represents an individual end user's account within a given Organization, uniquely identified within that Organization by their email address.";

`otps.email.loginOrSignup` wraps the [Send Login or Signup Email OTP](/api-reference/b2b/api/email-otp/organization/send-login-or-signup-otp) endpoint.

Use this method to send a one-time passcode (OTP) to a <Tooltip tip={member}>Member</Tooltip> via email that can be used to log in or create a new Member in an <Tooltip tip={organization}>Organization</Tooltip>.

## Parameters

<ParamField path="organization_id" type="string" required>
  The id of the Organization to login or signup to.

  You may also use the `organization_slug` or `organization_external_id` here as a convenience.
</ParamField>

<ParamField path="email_address" type="string" required>
  The email address to send the login or signup email to.
</ParamField>

<ParamField path="login_template_id" type="string">
  Use a custom template for login emails. By default, it will use your default email template. The template must be from Stytch's built-in customizations or a custom HTML email for Magic Links - Login.
</ParamField>

<ParamField path="signup_template_id" type="string">
  Use a custom template for signup emails. By default, it will use your default email template. The template must be from Stytch's built-in customizations or a custom HTML email for Magic Links - Signup.
</ParamField>

<ParamField path="locale" type="string">
  Used to determine which language to use when sending the user this delivery method. Parameter is an [IETF BCP 47 language tag](https://www.w3.org/International/articles/language-tags/), e.g. "en".

  Supported languages are English ("en"), Spanish ("es"), French ("fr") and Brazilian Portuguese ("pt-br"); if no value is provided, the copy defaults to English.
</ParamField>

## Response

<ResponseField name="request_id" type="string">
  Globally unique UUID that is returned with every API call. This value is important to log for debugging purposes; we
  may ask for this value to help identify a specific API call when helping you debug an issue.
</ResponseField>

<ResponseField name="status_code" type="number">
  The HTTP status code of the response. Stytch follows standard HTTP response status code patterns, e.g. 2XX values
  equate to success, 3XX values are redirects, 4XX are client errors, and 5XX are server errors.
</ResponseField>

<Panel>
  <RequestExample>
    ```javascript theme={null}
    import { StytchB2BClient } from '@stytch/vanilla-js/b2b';

    const stytch = new StytchB2BClient('public-token-test-b8c84de4-7d58-4ffc-9341-432b56596862');

    const sendEmailOTP = () => {
      stytch.otps.email.loginOrSignup({
        email_address: 'member@example.com',
        organization_id: 'organization-test-07971b06-ac8b-4cdb-9c15-63b17e653931',
      });
    };
    ```
  </RequestExample>
</Panel>