description: |
  Bad request.

  XML Schema used for body validation: [status.rng](../schema/status.rng)
content:
  application/xml; charset=utf-8:
    schema:
      $ref: '../schemas/api_response.yaml'
    examples:
      Unknown Command:
        value:
          code: unknown_command
          summary: "Allowed command is 'register'."
      Bad Request:
        value:
          code: err_register_save
          summary: "Could not save the registration, details: Login is the name of an already existing user and Password can't be blank."
