Added no-arg constructors

fints4k/src/commonMain/kotlin/net/dankito/banking/client/model/CustomerAccount.kt

@@ -32,6 +32,9 @@ open class CustomerAccount(
 ) : CustomerCredentials(bankCode, loginName, password) {
 
 
+    internal constructor() : this("", "", "", "", "", "") // for object deserializers
+
+
     override fun toString(): String {
         return "$bankName $loginName"
     }

fints4k/src/commonMain/kotlin/net/dankito/banking/client/model/response/FinTsClientResponse.kt

@@ -12,6 +12,9 @@ open class FinTsClientResponse(
   open val finTsModel: BankData? = null
 ) {
 
+  internal constructor() : this(null, null, listOf()) // for object deserializers
+
+
   open val successful: Boolean
     get() = error == null
 

fints4k/src/commonMain/kotlin/net/dankito/banking/client/model/response/GetAccountDataResponse.kt

@@ -13,6 +13,9 @@ open class GetAccountDataResponse(
     finTsModel: BankData? = null
 ) : FinTsClientResponse(error, errorMessage, messageLogWithoutSensitiveData, finTsModel) {
 
+    internal constructor() : this(null, null, null, listOf()) // for object deserializers
+
+
     open val retrievedTransactions: List<AccountTransaction>
         get() = customerAccount?.accounts?.flatMap { it.bookedTransactions } ?: listOf()
 

fints4k/src/commonMain/kotlin/net/dankito/banking/fints/messages/datenelemente/implementierte/tan/TanMedium.kt

@@ -18,7 +18,7 @@ open class TanMedium(
 ) {
 
 
-    internal constructor() : this(TanMediumKlasse.AlleMedien, TanMediumStatus.Verfuegbar, null)
+    internal constructor() : this(TanMediumKlasse.AlleMedien, TanMediumStatus.Verfuegbar, null) // for object deserializers
 
 
     override fun equals(other: Any?): Boolean {