如何获取已经连接的wifi密码

import wifiManager from '@ohos.wifiManager'; 
 
try { 
  let configs = wifiManager.getCandidateConfigs(); 
  console.info("configs:" + JSON.stringify(configs)); 
  let len = configs.length; 
  console.log("result len: " + len); 
  if(len > 0){ 
    for (let i = 0; i < len; ++i) { 
      console.info("ssid: " + configs[i].ssid); 
      console.info("bssid: " + configs[i].bssid); 
    } 
  } 
}catch(error){ 
  console.error("failed:" + JSON.stringify(error)); 
}