# Phone number authentication

Two-step phone authentication process. First call sends SMS code to the phone number. Second call with the code completes authentication and returns session token. Phone number must be registered to an existing account.

Endpoint: POST /api/v1/accounts/authenticate/phone
Version: 1.0
Security: 

## Request fields (application/json):

  - `phone` (string, required)
    Phone number
    Example: "+12345678901"

  - `code` (integer,null)
    Confirmation code
    Example: 854882

## Response 200 fields (application/json):

  - `sessionKey` (string, required)
    Persistent Token

## Response 400 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation

## Response 401 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation

## Response 404 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation