If you are a student and an instructor or staff member, you have two SPIRE accounts (a.k.a. roles). By default, your NetID and password will log you on to your instructor/staff account. Use your NetID and password, then select the Use alternate role check box to log on to SPIRE as a student.
To change these defaults, you can select your preferred SPIRE role and link your NetID with the SPIRE account of your choice.