# Authentication B2C

End-customer authentication methods. Get access tokens required for some API operations.


## Send SMS Verification Code

 - [POST /v1/book_code/{location_id}](https://developer.alteg.io/en/authentication-b2c/send_booking_verification_code.md): + Request body
    + phone (required, string, '+13155550175') - phone to which the code will be sent
    + fullname (option, sring, James) - Client name

## Authorize Online Booking User

 - [POST /v1/booking/auth](https://developer.alteg.io/en/authentication-b2c/authorize_online_booking_user.md): When a user of an online account changes their password, their API key will change and a new authorization will be required

| Attribute | Type | Description |
| ------------- | ------------- | ------------- |
| login | string | The visitor's phone number in the format +13155550175, or their email address. |
| password | string | Visitor password |

## Log in with phone number and code

 - [POST /v1/user/auth](https://developer.alteg.io/en/authentication-b2c/log_in_with_phone_number_and_code.md): To access both online and offline (e.g., phone-made) appointments, the user must log in by verifying their phone number. This is done by requesting a confirmation code to be sent via SMS using the "SMS phone number verification code" endpoint.