# OTC (One-Time Code) prelogin

Initiate passwordless authentication by sending a one-time code (OTC) to the user's email address.

This is the first step in the email OTC (one-time code) passwordless login flow for local users. The system sends a time-sensitive code to the specified email address.

Request body must include:
- email: The email address of the user initiating the login.
- invitationToken (optional): Include if the user is signing up through an invitation.
- recaptchaToken (optional): Required if reCAPTCHA is enabled for login.

Use this endpoint to start the passwordless login process via an email-based one-time code.

Endpoint: POST /resources/auth/v1/passwordless/code/prelogin
Security: bearer

## Request fields (application/json):

  - `recaptchaToken` (string)

  - `invitationToken` (string)

  - `email` (string, required)

  - `userId` (string, required)

  - `username` (string, required)


## Response 201 fields

## Response 400 fields