Fixed couple of endpoints, implemented more of the frontend

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

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