Is UNiDAYS a valid student ID?

Can you please clarify for me if UNiDAYS is considered a valid form of student identification? I've come across some services and discounts that require proof of student status, and I'm wondering if UNiDAYS would suffice in those situations. As a student, I'm always looking for ways to save money, and if UNiDAYS can act as my student ID, that would be incredibly convenient. Could you elaborate on the validity and acceptance of UNiDAYS as a student ID?