diff --git a/docs/ecolyo/functionalities/dacc.md b/docs/ecolyo/functionalities/dacc.md
index 02b13cd2313d314ff02d1c7f7fb70fd42e2420b7..e521fa4782d5d5a8d4ba69c83f84793c8ead9ebd 100644
--- a/docs/ecolyo/functionalities/dacc.md
+++ b/docs/ecolyo/functionalities/dacc.md
@@ -121,7 +121,7 @@ with:
 - *createdBy*: contains "ecolyo" value.
 - *startDate*: used to defined the start date of the indicator
 - *value*: contains a value relevant to the defined indicator (example: number of page viewed on a day).
-- *groups*: contains all attributes defining a indicator. Please refer to indicators definition (https://stats.cozycloud.cc/question#eyJkYXRhc2V0X3F1ZXJ5Ijp7ImRhdGFiYXNlIjo0LCJxdWVyeSI6eyJzb3VyY2UtdGFibGUiOjh9LCJ0eXBlIjoicXVlcnkifSwiZGlzcGxheSI6InRhYmxlIiwidmlzdWFsaXphdGlvbl9zZXR0aW5ncyI6e319)
+- *groups*: contains all attributes defining a indicator. Please refer to [indicators definition](https://stats.cozycloud.cc/question#eyJkYXRhc2V0X3F1ZXJ5Ijp7ImRhdGFiYXNlIjo0LCJxdWVyeSI6eyJzb3VyY2UtdGFibGUiOjh9LCJ0eXBlIjoicXVlcnkifSwiZGlzcGxheSI6InRhYmxlIiwidmlzdWFsaXphdGlvbl9zZXR0aW5ncyI6e319)
 - *mesureName*: contains one of the following value 
   
 | ENUM | value |
@@ -161,22 +161,26 @@ There is two remote doctypes pointing to two different mode. `dacc-dev` is used
 
 First you need to modify the service in order to be able to see data in local :
 
+- Run a local server that will listen and log events.
+```sh
+node srcipts/server.js
+```
 
-- Modify dacc URL in order to see data  (ligne 67)
+- Edit dacc URL (line 67) to send requests to your local server at `http://localhost:8081`
 ```js
     await client
       .getStackClient()
       .fetchJSON(
         'POST',
         environments.isProduction()
-          ? 'http://localhost:8081'
-          : '/remote/cc.cozycloud.dacc.dev',
+          ? '/remote/cc.cozycloud.daccv_2'
+          : 'http://localhost:8081',
         {
           data: JSON.stringify(indicator),
         }
       )
 ```
-- Remove date protection if you want to test monthly indicators (ligne 1100)
+- For **monthly indicators**, remove date protection (ligne 1100)
 ```js
   if (
     profile
@@ -189,20 +193,25 @@ First you need to modify the service in order to be able to see data in local :
   ) {
 ```
 
+- Generate usage events by navigating through the app
 
-Then you need to launch a script that will simulate dacc api. This terminal will listen to incoming request
+You will be able to see previous events and freshly genereated events in the db `com-grandlyon-ecolyo-usageevent`
 
-```sh
-cd ./scripts
-node server.js
-```
+:warning: because the cron run every day at 2am, it will take events from the day before. So if you want to test specific usage, you will have to edit the `eventDate` of events you want to send.
 
-Then you are finally ready to test ! Just run the following :
 
+- Then you are finally ready to test ! Just run the following :
+
+*If aggregatorUsageEvents changed*
+```sh
+yarn build-dev:browser & yarn run cozy-konnector-dev -m ./manifest.webapp ./build/services/aggregatorUsageEvents/ecolyo.js
+```
+*To save time, when running multiple times and if aggregatorUsageEvents didn't change, you don't have to build.*
 ```sh
-yarn build-dev:browser; yarn run cozy-konnector-dev -m .\manifest.webapp .\build\services\aggregatorUsageEvents\ecolyo.js
+yarn run cozy-konnector-dev -m ./manifest.webapp ./build/services/aggregatorUsageEvents/ecolyo.js
 ```
-You must see sent indicators in the previously open terminal 
+
+- You should see sent indicators in the logs of your local server
 
 ```json
 {
@@ -215,8 +224,21 @@ You must see sent indicators in the previously open terminal
 
 ## How to add new indicator ? 
 
-You have to reach cozy and discuss with them about new indicators. They will implement it for `dacc-dev` and `dacc` and you will be able to test it on alpha env. Remember you will need at least 5 data of each type to see it in metabase.
+You have to reach cozy and discuss with them about new indicators. They will implement it for `dacc-dev` and `dacc` and you will be able to test it on alpha env. Remember you will need **at least 5 data** of each type to see it in metabase.
 
 ## Visualisation 
 
-All the data aggregated in the dacc can be visualized with a *Metabase* website hosted by cozy (https://stats.cozycloud.cc/).
+All the data aggregated in the dacc can be visualized with a *Metabase* website hosted by [cozy](https://stats.cozycloud.cc/).
+
+## Errors
+More here in [DJU](https://doc.self-data.alpha.grandlyon.com/ecolyo/functionalities/profile_type/).
+
+If there is an authentication error, the api will returns an error in html format to cozy, so you'll get from cozy an error 502 as following, because cozy expects a json response :
+```json
+{
+  "status": "502",
+  "title": "Bad Gateway",
+  "detail": "the content-type for the response is not authorized",
+  "source": {}
+}
+```