curl --request POST \
  --url https://{appid}.api-{region}.cometchat.io/v3/groups/{guid}/members \
  --header 'Content-Type: application/json' \
  --header 'apikey: <api-key>' \
  --data '{
  "admins": [],
  "moderators": [],
  "participants": [],
  "usersToBan": []
}'

{
  "data": {
    "usersToBan": {
      "superhero6": {
        "success": true
      }
    },
    "admins": {
      "superhero1": {
        "success": true,
        "data": {
          "id": "32",
          "conversationId": "group_project-group",
          "sender": "app_system",
          "receiverType": "group",
          "receiver": "project-group",
          "category": "action",
          "type": "groupMember",
          "data": {
            "action": "added",
            "entities": {
              "by": {
                "entity": {
                  "uid": "app_system",
                  "name": "System",
                  "role": "default",
                  "status": "offline",
                  "createdAt": 1596537299
                },
                "entityType": "user"
              },
              "on": {
                "entity": {
                  "uid": "superhero1",
                  "name": "Iron Man",
                  "role": "default",
                  "avatar": "https://data-us.cometchat.io/assets/images/avatars/ironman.png",
                  "status": "offline",
                  "createdAt": 1596537299
                },
                "entityType": "user"
              },
              "for": {
                "entity": {
                  "guid": "project-group",
                  "icon": "http://placehold.it/120x120&text=image1",
                  "name": "Project Group",
                  "tags": [
                    "friends",
                    "project"
                  ],
                  "type": "public",
                  "owner": "superhero2",
                  "createdAt": 1625460947,
                  "description": "project related discussions between members",
                  "membersCount": 2,
                  "conversationId": "group_project-group"
                },
                "entityType": "group"
              }
            }
          },
          "sentAt": 1625460972,
          "updatedAt": 1625460972
        }
      }
    },
    "moderators": {
      "superhero3": {
        "success": true,
        "data": {
          "id": "33",
          "conversationId": "group_project-group",
          "sender": "app_system",
          "receiverType": "group",
          "receiver": "project-group",
          "category": "action",
          "type": "groupMember",
          "data": {
            "action": "added",
            "entities": {
              "by": {
                "entity": {
                  "uid": "app_system",
                  "name": "System",
                  "role": "default",
                  "status": "offline",
                  "createdAt": 1596537299
                },
                "entityType": "user"
              },
              "on": {
                "entity": {
                  "uid": "superhero3",
                  "name": "Spiderman",
                  "role": "default",
                  "avatar": "https://data-us.cometchat.io/assets/images/avatars/spiderman.png",
                  "status": "offline",
                  "createdAt": 1596537299,
                  "updatedAt": 1625234590
                },
                "entityType": "user"
              },
              "for": {
                "entity": {
                  "guid": "project-group",
                  "icon": "http://placehold.it/120x120&text=image1",
                  "name": "Project Group",
                  "tags": [
                    "friends",
                    "project"
                  ],
                  "type": "public",
                  "owner": "superhero2",
                  "createdAt": 1625460947,
                  "updatedAt": 1625460972,
                  "description": "project related discussions between members",
                  "membersCount": 3,
                  "conversationId": "group_project-group"
                },
                "entityType": "group"
              }
            }
          },
          "sentAt": 1625460973,
          "updatedAt": 1625460973
        }
      }
    },
    "participants": {
      "superhero4": {
        "success": true,
        "data": {
          "id": "34",
          "conversationId": "group_project-group",
          "sender": "app_system",
          "receiverType": "group",
          "receiver": "project-group",
          "category": "action",
          "type": "groupMember",
          "data": {
            "action": "added",
            "entities": {
              "by": {
                "entity": {
                  "uid": "app_system",
                  "name": "System",
                  "role": "default",
                  "status": "offline",
                  "createdAt": 1596537299
                },
                "entityType": "user"
              },
              "on": {
                "entity": {
                  "uid": "superhero4",
                  "name": "Wolverine",
                  "role": "default",
                  "avatar": "https://data-us.cometchat.io/assets/images/avatars/wolverine.png",
                  "status": "offline",
                  "createdAt": 1596537299
                },
                "entityType": "user"
              },
              "for": {
                "entity": {
                  "guid": "project-group",
                  "icon": "http://placehold.it/120x120&text=image1",
                  "name": "Project Group",
                  "tags": [
                    "friends",
                    "project"
                  ],
                  "type": "public",
                  "owner": "superhero2",
                  "createdAt": 1625460947,
                  "updatedAt": 1625460973,
                  "description": "project related discussions between members",
                  "membersCount": 4,
                  "conversationId": "group_project-group"
                },
                "entityType": "group"
              }
            }
          },
          "sentAt": 1625460973,
          "updatedAt": 1625460973
        }
      },
      "superhero5": {
        "success": true,
        "data": {
          "id": "35",
          "conversationId": "group_project-group",
          "sender": "app_system",
          "receiverType": "group",
          "receiver": "project-group",
          "category": "action",
          "type": "groupMember",
          "data": {
            "action": "added",
            "entities": {
              "by": {
                "entity": {
                  "uid": "app_system",
                  "name": "System",
                  "role": "default",
                  "status": "offline",
                  "createdAt": 1596537299
                },
                "entityType": "user"
              },
              "on": {
                "entity": {
                  "uid": "superhero5",
                  "name": "Cyclops",
                  "role": "default",
                  "avatar": "https://data-us.cometchat.io/assets/images/avatars/cyclops.png",
                  "status": "offline",
                  "createdAt": 1596537299
                },
                "entityType": "user"
              },
              "for": {
                "entity": {
                  "guid": "project-group",
                  "icon": "http://placehold.it/120x120&text=image1",
                  "name": "Project Group",
                  "tags": [
                    "friends",
                    "project"
                  ],
                  "type": "public",
                  "owner": "superhero2",
                  "createdAt": 1625460947,
                  "updatedAt": 1625460973,
                  "description": "project related discussions between members",
                  "membersCount": 5,
                  "conversationId": "group_project-group"
                },
                "entityType": "group"
              }
            }
          },
          "sentAt": 1625460973,
          "updatedAt": 1625460973
        }
      }
    }
  }
}