Not sure. I never got the website to work and calling in to check your balance is a hassle.
I've been using the hygo app
https://play.google.com/store/apps/details?id=com.mylookinc.hygo
It let's you load your mirai fuel card in and shows you usage history and card balance.
Hygo is a great app, shows stations and you can link your fuel card to show balance
https://play.google.com/store/apps/details?id=com.mylookinc.hygo
H2 guru is also nice, but relies on people reporting the price https://play.google.com/store/apps/details?id=com.deeproot.h2guru
Nikola Motor says they are going to build a US National Solar Hydrogen fueling network with over 300 stations. http://nikolamotor.com more on Nikola /r/NikolaMotor
Even if they don't, it will happen, one way or another. Because solar hydrogen is the fuel of the future.