Added PictureLike struct

modules/structs/pictureLike.go

@@ -1,6 +1,14 @@
 package structs
 
+import "time"
+
 type PictureLike struct {
 	UserId    string
 	PictureId string
+	LikedAt   time.Time
+}
+
+type APIPictureLike struct {
+	UserId    string
+	PictureId string
 }