Added countryCode

BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/BankAccess.kt

@@ -56,7 +56,11 @@ open class BankAccess(
     open var tanMedia: List<TanMedium> = listOf(),
 
     var bankingGroup: BankingGroup? = null,
-    open var serverAddress: String? = null
+    open var serverAddress: String? = null,
+    /**
+     * The ISO code of the country where the bank resides and to know the system of [domesticBankCode].
+     */
+    val countryCode: String = "de"
 ) {
 
     var userSetDisplayName: String? = null

FinTs4jBankingClient/src/commonMain/kotlin/net/codinux/banking/client/fints4k/FinTs4kMapper.kt

@@ -148,7 +148,8 @@ open class FinTs4kMapper {
         bank.selectedTanMedium?.mediumName, bank.tanMedia.map { mapTanMedium(it) },
 
         info?.bankingGroup ?: getBankingGroup(bank.bankName, bank.bic),
-        bank.finTsServerAddress
+        bank.finTsServerAddress,
+        "de"
     )
 
     protected open fun getBankingGroup(bankName: String, bic: String): BankingGroup? =