Make more fields optional for Nordigen

handler/lib/serde/nordigen.py

@@ -32,7 +32,7 @@ class Transaction(Model):
     proprietaryBankTransactionCode: fields.Optional(fields.Str())
     remittanceInformationUnstructured: fields.Optional(fields.Str())
     transactionAmount: fields.Nested(Amount)
-    transactionId: fields.Str()
+    transactionId: fields.Optional(fields.Str())
 
 
 class Pending(Transaction):
@@ -93,16 +93,16 @@ class Requisitions(Model):
 
 class Account(Model):
     resourceId: fields.Optional(fields.Str())
-    iban: fields.Str()
+    iban: fields.Optional(fields.Str())
     bban: fields.Optional(fields.Str())
     currency: fields.Str()
-    ownerName: fields.Str()
+    ownerName: fields.Optional(fields.Str())
     status: fields.Optional(fields.Str())
     details: fields.Optional(fields.Str())
 
 
 class AccountDetails(Model):
-    account: fields.Nested(Account)
+    account: fields.Optional(fields.Nested(Account))
 
 
 class AccountBalanceAmount(Model):