pubProvidedIdSystem: Document the eids param (#6604)

* Document the eids param

* linting errors

Author: robin-crazygames

dev-docs/modules/userid-submodules/pubprovided.md

@@ -116,10 +116,11 @@ gulp build --modules=pubProvidedIdSystem
 
 {: .table .table-bordered .table-striped }
 
-| Params under usersync.userIds[]| Scope | Type | Description | Example |
+| Params under usersync.userIds[] | Scope | Type | Description | Example |
 | --- | --- | --- | --- | --- |
-| name | Required | String | ID value for the ID module  | `"PubProvided"` |
+| name | Required | String | ID value for the ID module | `"PubProvided"` |
 | params | Optional | Object | Details for syncing. | |
-| params.eidsFunction | Optional | function | any function that exists in the page | getIdsFn() |
+| params.eids | Optional | Object[] | Array of extended identifiers as defined in the OpenRTB specification. | |
+| params.eidsFunction | Optional | function | any function that exists in the page and returns an array of extended identifiers. The results are concatenated with `eids` | getIdsFn() |
 | uids.atype | optional | int | ADCOM - Type of user agent the match is from | `"1"` |
 | uids.ext.stype | Optional | String | Description of how the id was generated and by whom eg. ('ppuid','DMP','other') | `DMP` |