feat: update staff data

internal/utilities/utils/struct_to_map.go

@@ -1,7 +1,7 @@
 package utils
 
 import (
-	"errors"
+	"fmt"
 	"reflect"
 )
 
@@ -11,14 +11,14 @@ func StructToMap(s any) (map[string]any, error) {
 	val := reflect.ValueOf(s)
 
 	if val.Kind() != reflect.Struct {
-		return nil, errors.New("provided value is not struct")
+		return nil, fmt.Errorf("provided value is not struct")
 	}
 
 	for i := range val.NumField() {
 		field := val.Type().Field(i)
 		value := val.Field(i)
 
-		if value.IsZero() || value.IsNil() {
+		if !value.IsValid() {
 			continue
 		}