How long does my refresh token generated from OAuth flow lasts if my app hasn't approved by the box.com yet. According to the documentation it's 60 days once generated by I think it doesn't lasts that longer at the moment.

I save the new refresh token every time I generate a new access token and do everything according to the documentation. I'm wondering if it doesn't last longer as mentioned in the documentation because my app hasn't approved yet. 

IF such a limitation how can I extend it. Because It's very important that I'm able to run this until I get it approved and re-doing OAuth flow every hour would not be practical.

Please advice. Thanks