[Based On Dev]Give a way to specify student last name using braces #2427

for #2427
professor @damithc , we may not omit this "studentsLogic" database read here because the method gerNameForEmail is not actually reading the database and it is actually getting the name from a table. This table may contains "Instructor name" and even "team name" for which last name may not be inferred. So we need to see whether the email is of a student so as to take the value of the attribute lastName.