curl --request POST \
  --url https://{appid}.api-{region}.cometchat.io/v3/users/{uid}/friends \
  --header 'Content-Type: application/json' \
  --header 'apikey: <api-key>' \
  --data '{
  "accepted": [
    "<string>"
  ]
}'

{
  "data": {
    "accepted": {
      "superhero2": {
        "success": true,
        "message": "Created relationship with status accepted."
      },
      "superhero3": {
        "success": true,
        "message": "Created relationship with status accepted."
      }
    }
  }
}