Added check for archived patron

src/main/kotlin/service/PatronService.kt

@@ -80,7 +80,7 @@ class PatronService(private val connection: Connection) {
             statement.setString(1, username)
             val resultSet = statement.executeQuery()
             return if (resultSet.next()) {
-                resultSet.getString("password") == password
+                resultSet.getString("password") == password && !resultSet.getBoolean("is_archived")
             } else {
                 throw SQLException()
             }