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LUSID automatically generates a unique ID for every user, whether personal or service.

You may need to know a user's ID to perform a particular operation, for example setting up an automated activity on behalf of a service user, or filtering entities created or modified by a particular user.

Assuming you have appropriate permissions, you can discover user IDs by navigating to the Identity and Access > Users dashboard in the LUSID web app:

Alternatively, you can call the Identity ListUsers API:

[
  {
    "id": "00ubs2temhwlYz2lI2p7",
    "emailAddress": "john.doe@acme.com",
    "login": "john.doe@acme.com",
    "firstName": "John",
    "lastName": "Doe",
    "type": "Personal",
    "status": "PROVISIONED",
    "external": false,
    ...
  },
  {
    "id": "00ubk5b5apJVhOlAg2p7",
    "emailAddress": "jane.doe@acme.com",
    "login": "jane.doe@acme.com",
    "firstName": "Jane",
    "lastName": "Doe",
    "type": "Personal",
    "status": "PROVISIONED",
    "external": false,
    ...
  }
]

Conversely, if you know a user's ID and want to discover more information about them, call the FindUsersById API.