anchor.diff:  + cvv: 160 (string) - CVV/CVC code.
   
   ### `CardNumber`
  -+ type: card-number (string)
  ++ type: `card-number` (string)
   + number: 5591587543706253 (string) - Card number.
   
   ### `CardToken`
   + type: `card-token` (string) - Type. Simplifies futher requests that require it.
  -+ token: `card-token-6253-8a6985e8247a194c58872d85d5ffad05742679fe` (string) - Token that can be used to create payment with this card. Followed by last 4 digits from card number.
  ++ token: `card-token-6253-8a6985e8247a194c58872d85d5ffad05742679fe` (string) - Token that can be used to create transfer with this card. Followed by last 4 digits from card number.
   
   ### `CardToken_Full`
   + Include CardToken
   + `token_expires_at`: `2016-10-29T17:35:28.274477Z` (string) - ISO datetime that signals when token will be expired.
   
  -<!-- Peer -->
  +### `ExternalCredential`
  ++ type: `external-credential` (string)
  ++ id: my_id (string) - Any ID that is relevant to an external system that will complete this transfer.
  ++ metadata (object) - Metadata object that can be used by your system to store additional recipients credential details.
  +
  +## Peers
   ### Peer
   + phone: +380631112233 (string, optional) - Peer phone number.
   + email: smith@example.com (string, optional) - Peer's email.
  
positive.code: + One Of
      + credential (CardNumber)
      + credential (CardToken)
  
  <!-- Payment -->
  ### Payment
  + amount: 1000 (number) - Payment amount.
  + fee: 10 (number) - Payment fee.
  + description: some content (string, optional) - Payment description
  + metadata (object, optional) - Metadata for payment. Can store any keys and values that match [specification](http://docs.apimanifest.apiary.io/#introduction/optional-features/metadata).
  + sender (Peer_Sender)
  + recipient (Peer_Recipient)
  
  ### `Payment_Full`
  + id: 1 (string) - Payment ID that can be used to fetch it later.
  + status: authorization (enum) - Payment status.
      + authorization
      + completed
      + processing
      + declined
      + error
  + Include Payment
  + sender (Peer_Sender)
      + One Of
          + credential (Card)
          + credential (CardToken_Full)
  + recipient (Peer_Recipient)
      + One Of
          + credential (CardNumber)
          + credential (CardToken_Full)
  + token: `payment-token-70eb3c2b-9ef0-41b9-989b-0d4bf1d10831` (string) - Access token that can be used to fetch payment later.
  + `token_expires_at`: `2016-10-18T13:50:40.54502Z` (string) - ISO datetime that signals when token will be expired.
  + updated_at: `2016-10-18T13:50:39.677992` (string) - ISO datetime when there was last change in payment.
  + created_at: `2016-10-18T13:50:39.677992` - ISO datetime when payment was created.
  
  ### `Payment_FullWithAuth`
  + Include Payment_Full
  + One Of
      + auth (Payment_Auth_3DS)
      + auth (Payment_Auth_Lookup)
  
  ### `Payment_Auth_3DS`
  + type: `3d-secure` (string) Type of authorization.
  + acs_url
  + md
  + pa_req
  + terminal_url
  
  ### `Payment_Auth_Lookup`
  + type: `lookup-code` (string) Type of authorization.
  + md
negative.code: FORMAT: 1A
  HOST: https://tokenizer-api.herokuapp.com/
  
  # Mbill Transfer Tokenization Service
  
  # Authorization
  
  