CreateUser creates a new user and returns the ID.

DeleteUser removes a user by ID.

GetAllUsers sends the entire users table, possibly filtered by provided query parameters.

GetUser sends the information of the user with the specified ID.

UpdateUser updates the information for a user.

HiddenError signifies that an error should be logged but not reported to the client.

Migration defines a user that needs to be assigned a cohort role.

Migrator is something that can migrate a user to the new cohort by name.