> For the complete documentation index, see [llms.txt](https://docs.abbey.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.abbey.io/reference/referencing-users-and-groups.md).

# Referencing Users and Groups

## Overview

Abbey has the ability to reference users and group members stored externally for use in Grant Kits. 

These are most commonly used in two places: 

* Building a Workflow (I'd like Bob to approve, or members of this group to approve)
* Creating an Output (assign the requester a permission)

For understanding how these data can be used in Access Policies, please see [Policy Examples](/reference/access-policies/policy-examples.md). 

## User References

An Output block is templatized code change that assigns a user to a particular permission. In order to do that, we need to reference the identifier for a user. 

Below shows how an example for AWS Identity Center. 

```
member_id = "{{ user.aws_identitystore.id }}"
```

## Group References

Abbey has the ability to use Group Memberships in the context of a workflow. 

For example, the below references a set of Users in a Google Workspace group. Abbey will send an approval to all members of that group, with only one (due to `one_of`)  needing to approve for a user to get access. 

```
one_of = ["{{ groups.googleworkspace.03oy7u2934pbgyw }}"]
```