By default, there are no Minecraft server operators, also known as OPs, on your Minecraft server. Being an OP grants you full permissions to your Minecraft server.
To "OP" yourself or others, you will first need to log into your Multicraft control panel, and select your Minecraft server.
Once you have selected your Minecraft server, please follow these steps:
1. On the left hand side of your control panel click "Console".
2. In the text box above the console, type "op <username>", where <username> is the Minecraft username of the player you wish to OP. As an example, we would type "op MCProHosting", without the quotation marks.
3. Either click the "Send" button located to the right of the text box, or press the "Enter" key on your keyboard.
You will receive a response similar to "[Server] INFO CONSOLE: Opped MCProHosting"