I have been using spotify's free-trial for almost a month now, and the free part of it is just about to end. 

I know that after the free trial is over, I will be charged $10.00 per month, like a usual spotify premium account.

However, I have recently enrolled in a university, and I am eligible for the $5.00 student rate. I would like to take advantage of this, but I don't know how to switch to the student option. Could anybody help me out with the switch?

Thank you for your time and help.