# Configure elastic-apm-node
**URL:** https://discuss.elastic.co/t/configure-elastic-apm-node/337272
**Category:** APM
**Tags:** nodejs
**Created:** [June 30, 2023, 6:35am UTC](https://discuss.elastic.co/t/configure-elastic-apm-node/337272 "2023-06-30T06:35:25Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Supun\_Madushanka](https://discuss.elastic.co/u/Supun_Madushanka)
#### Post date: [June 30, 2023, 6:35am UTC](https://discuss.elastic.co/t/configure-elastic-apm-node/337272/1 "2023-06-30T06:35:25Z")
elastic cloud latest version
```auto
const config = require('./config');
const apm = require('elastic-apm-node').start({
serviceName: config.ELASTIC_APM_SERVICE_NAME,
secretToken: config.ELASTIC_APM_SERVICE_SECRET,
serverUrl: config.ELASTIC_APM_SERVER_URL,
environment: config.ELASTIC_APM_ENV,
})
function globalUser (payload) {
if (payload.context &&
payload.context.request &&
payload.context.request.headers &&
payload.context.request.headers['x-user-id']) {
// redact sensitive data
const xUserId = payload.context.request.headers["x-user-id"]
console.log(xUserId)
apm.setUserContext({id: xUserId})
}
return payload // remember to return the modified payload
}
apm.addFilter(globalUser)
module.exports = apm;
```
this is not updated user.id
---
### Author:  [@trentm](https://discuss.elastic.co/u/trentm)
#### Post date: [June 30, 2023, 3:25pm UTC](https://discuss.elastic.co/t/configure-elastic-apm-node/337272/2 "2023-06-30T15:25:31Z")
Hi @Supun_Madushanka.
Functions added via `apm.addFilter` are invoked **just before** tracing data is sent to the APM server. At this point the span or transaction has already ended, which means that `apm.setUserContext(...)` -- which is an API to change the **active** transaction -- will not operate on the `payload` data in that function.
You said (in your Slack post) that this was an Express app. What will probably work better would be to create a small Express middleware function that does a similar thing. Something like this:
```js
app.use(function (req, res, next) {
const userId = req.headers['x-user-id']
if (userId) {
apm.setUserContext({id: userId})
}
next()
})
```
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 28, 2023, 3:26pm UTC](https://discuss.elastic.co/t/configure-elastic-apm-node/337272/3 "2023-07-28T15:26:24Z")
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