The subsidized users you entered into your institutional account need to first create an account on Scholastica at https://scholasticahq.com/users/sign_up.
As long as your users create their account using the email address you are subsidizing, then their Scholastica account will automatically be linked to your institutional account.
You can verify that a user has successfully linked their accounts by logging into your institutional account at https://institutions.scholasticahq.com, clicking “Manage subsidized authors”, and look for the author's name or email in the authors table. You will be able to see if they have created an account on Scholastica.
To learn more about being an institutional administrator, check out our Institutional Administrator Guide.