Currently there is no way to change the user's role from Driver to anything else. I was testing different access levels and once I made the user a Driver role I was not able to delete the user nor change the role of the user. The technician from School Dude was not able to delete the account from his end as well.
In the mean time, they can assist in a work around for the user if they need to change role but the driver account cannot be delete at this time.
Hopefully, this will be something that will be corrected in the future.