In order to set up ops on your minecraft server, you will need to go to Clanforge>Edit Profile>Configs and then in the OPS.json file have a config like the one below:

ops.json
[
  {
    "uuid": "UUID-goes-here",
    "name": "notch",
    "level": 4
  },
  {
    "uuid": "UUID-goes-here",
    "name": "user1",
    "level": 4
  },
  {
    "uuid": "UUID-goes-here",
    "name": "player1",
    "level": 4
  }
]

You can find the user UUID at https://mcuuid.net/