AUTHENTICATION_TYPE:
  description: |
    Indicates the type of authentication method the Issuer will or did use to challenge the consumer to complete the strong authentication process using 3D Secure v2.
  type: integer
  enum:
    - 1
    - 2
    - 3
    - 4
    - 99
  x-enum-varnames:
    - STATIC
    - DYNAMIC
    - OUT_OF_BAND
    - DECOUPLED
    - UNKNOWN
  x-enum-descriptions:
    - Static authentication challenge of the consumer
    - Dynamic authentication challenge of the consumer
    - Out of band authentication challenge of the consumer such as sending a one time password to the consumer's mobile phone via SMS
    - Decoupled authentication via a wallet such as Apple Pay or MobilePay Online
    - Unknown type of authentication reserved for use by the Directory Server
  example: 2