Merge pull request #216 from magdignomad/patch-20

Added cbUser for France as mandatory field

doc/appendix-fr-boi-tva-decl-30-10-30/data-structures/data-structures.md

@@ -15,6 +15,7 @@ This table describes fields of the receipt request applicable to the French mark
 
 | Field name                | Data type    | Default Value Mandatory Field | Description                                                                                              | Version |
 |---------------------------|--------------|-------------------------------|----------------------------------------------------------------------------------------------------------|---------|
+| `cbUser`                  |String<br/>max 1k|empty-string<br/>mandatory  |Identification of the user (Number, name, ...), who creates the receipt. Although all string values are supported, we suggest using data structures serialized into JSON format. |1.2      |
 | `cbReceiptAmount`         |`Decimal`?    | null<br />mandatory           | Total receipt amount incl. taxes (gross receipt amount).                                                 | 1.2     |
 | `ftPosSystemId`           |`guid/string` | mandatory                     | This field identifies and documents the type and software version of the PosSystem sending the request. It is used for audits and as a base for commission calculation. The PosSystem itself has to be created in the portal and its ID can be implemented as a constant value by the PosCreator. | 1.2      |