curl --request POST \
  --url https://{appid}.api-{region}.cometchat.io/v3/users \
  --header 'Content-Type: application/json' \
  --header 'apikey: <api-key>' \
  --data '{
  "uid": "<string>",
  "name": "<string>",
  "avatar": "<string>",
  "link": "<string>",
  "role": "<string>",
  "statusMessage": "<string>",
  "metadata": {
    "@private": {
      "email": "user@email.com",
      "contactNumber": "0123456789"
    }
  },
  "tags": [],
  "withAuthToken": true
}'

{
  "data": {
    "uid": "superhero6",
    "name": "Barry Allen",
    "link": "http://placehold.it",
    "avatar": "http://placehold.it/120x120&text=image1",
    "metadata": {
      "rawMetadata": "{'gender':'Male'}"
    },
    "status": "offline",
    "role": "manager",
    "createdAt": 1638354015,
    "tags": [
      "Engineer",
      "manager"
    ],
    "authToken": "superhero6_16383540156641d37a023c75d26f4c22a21ff126"
  }
}