After a change in the database that made email addresses unique, caused a bug...

After a change in the database that made email addresses unique, caused a bug where new employees on the app to not be added after the first one.

SchedulerApp/src/main/java/com/example/scheduler_server/Staff.java

@@ -42,9 +42,15 @@ public class Staff {
         String newEmployee = "";
         try {
             Statement myStatement = dbConnection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
-            myStatement.executeUpdate("insert into Employees (first_name,last_name,isManager,email,phoneNumber,wage)" +
-                    " values ('" + firstName + "','" + lastName + "'," + isManager + ",'" + email + "','" +
-                    phoneNumber + "'," + wage + ")");
+            if (email.equals("empty")) {
+                myStatement.executeUpdate("insert into Employees (first_name,last_name,isManager,email,phoneNumber,wage)" +
+                        " values ('" + firstName + "','" + lastName + "'," + isManager + ", null,'" +
+                        phoneNumber + "'," + wage + ")");
+            } else {
+                myStatement.executeUpdate("insert into Employees (first_name,last_name,isManager,email,phoneNumber,wage)" +
+                        " values ('" + firstName + "','" + lastName + "'," + isManager + ",'" + email + "','" +
+                        phoneNumber + "'," + wage + ")");
+            }
             ResultSet myRs = myStatement.executeQuery("select * from Employees where first_name='" + firstName
                     + "' and last_name='" + lastName + "'");
             if (myRs.last()) {