Fix error in user import

src/allmende_payment_system/cli.py

@@ -131,10 +131,10 @@ def import_transactions(filepath: str):
                         continue
                     user = users[0]
 
-                if account not in user.accounts:
-                    print(f"Adding user {user.username} to account {account.name}")
-                    user.accounts.append(account)
-                    db.flush()
+                    if account not in user.accounts:
+                        print(f"Adding user {user.username} to account {account.name}")
+                        user.accounts.append(account)
+                        db.flush()
 
         if transaction_type == "essen" or transaction_type == "essen kind":
             if row["stueck"] == 0: