changes...

internal/application/errors/db_error.go

@@ -0,0 +1,15 @@
+package errors
+
+type DBError struct {
+	msg string
+}
+
+func NewDBError(msg string) DBError {
+	return DBError{
+		msg: msg,
+	}
+}
+
+func (e *DBError) Error() string {
+	return e.msg
+}

internal/application/errors/not_found_error.go

@@ -0,0 +1,15 @@
+package errors
+
+type NotFoundError struct {
+	msg string
+}
+
+func NewNotFoundError(msg string) *NotFoundError {
+	return &NotFoundError{
+		msg: msg,
+	}
+}
+
+func (e *NotFoundError) Error() string {
+	return e.msg
+}