Fix expense/income creation

src/main/java/com/faf223/expensetrackerfaf/dto/IncomeDTO.java

@@ -1,6 +1,7 @@
 package com.faf223.expensetrackerfaf.dto;
 
 import com.faf223.expensetrackerfaf.model.IncomeCategory;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 
@@ -9,10 +10,11 @@ import java.time.LocalDate;
 
 @Data
 @AllArgsConstructor
+@JsonIgnoreProperties({"incomeCategory"})
 public class IncomeDTO {
     private long incomeId;
     private UserDTO userDTO;
-    private IncomeCategory category;
+    private IncomeCategory incomeCategory;
     private LocalDate date;
     private BigDecimal amount;
-}
+}