curl -X POST "http://localhost:5001/user/onlinestatus" \
  -H "Content-Type: application/json" \
  -d '["user1", "user2", "user3"]'

const userIds = ["user1", "user2", "user3"];

const response = await fetch('http://localhost:5001/user/onlinestatus', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify(userIds)
});

const data = await response.json();
console.log(data);

import requests

user_ids = ["user1", "user2", "user3"]

response = requests.post('http://localhost:5001/user/onlinestatus', json=user_ids)
data = response.json()
print(data)

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "net/http"
)

func main() {
    userIds := []string{"user1", "user2", "user3"}
    jsonData, _ := json.Marshal(userIds)
    
    resp, err := http.Post(
        "http://localhost:5001/user/onlinestatus",
        "application/json",
        bytes.NewBuffer(jsonData),
    )
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()
    
    var result []map[string]interface{}
    json.NewDecoder(resp.Body).Decode(&result)
    fmt.Printf("%+v\n", result)
}

[
  {
    "uid": "user1",
    "online": 1,
    "device_flag": 1
  },
  {
    "uid": "user2",
    "online": 0,
    "device_flag": 0
  },
  {
    "uid": "user3",
    "online": 1,
    "device_flag": 2
  }
]