Is your feature request related to a problem? Please describe.
Suppose we are unable to use RPI SSO. In that case, we need a way to invite professors and graduate students in without letting normal students have the option to become professors/graduate students.
Describe the solution you'd like
Use a token/secret in an invite link that is a portal to log in and choose professor/graduate/etc.
Additional context
This should only be done if we can't use RPI SSO or RPI SSO does not return data like who is a professor or who is a student.