# POST /users/activate
URL: https://developers.vsee.io/api/user-api/post/users/activate
operationId: activateUser
Auth: Account Code Only — Only requires the X-AccountCode header. No token needed.

Activate user

Checks user info against an eligibility file if configured for the current account. The user will receive an email with an activation code.

Parameters:
- X-AccountCode (header, string, required) — Account code

Request body (application/x-www-form-urlencoded):
- first_name (string, required)
- last_name (string, required)
- email (string, required)
- dob (string, optional) — Date of birth (YYYY-MM-DD)
- ssn (string, optional) — Last 4 digits of SSN

Example request:
```json
{
  "first_name": "An",
  "last_name": "Nguyen",
  "email": "an@vseeclinic.com"
}
```

Responses:
- 200 — Activation email sent
```json
{
  "data": true
}
```
- 400 — Bad Request
```json
{
  "code": 404,
  "message": "Sorry, this page is not available."
}
```