How do i OP someone?
You can OP some one by using the command /op <username>, please note that if you use this method it will remove the OP when the server re-starts. If you want to permanently OP someone go to the APP, then settings, and then administrators. Finally, set the username that you want to OP in the text-field. To remove an OP use /deop <username> or click the X next to their name.