Authentication and User Management


Users will be asked to authenticate when accessing content stored within Nucleus running on a workstation or an Enterprise Nucleus Server. Upon authentication a connection token is stored locally on the workstation. (Tokens reduce the need to re-authenticate.) If content has not been accessed for some time, the token will expire requiring the user to reauthenticate which will refresh the token re-allowing access.

Nucleus Web Login

User Management

Click the User Management icon to access user accounts and groups.

(Navigator 3.4)

Nucleus Web User Management Toggle

(Navigator 3.3 and below)

Nucleus Web User Management Toggle

Select a user in the list (#1) to manage the account in the details panel (#2).

(Navigator 3.4)

Navigator 3.4 User Management

Navigator 3.4 User Management Mode

(Navigator 3.3 and below)

Nucleus Web User Management Mode

Create Account & Invite User

An administrator can create accounts and invite users to join:

  1. Make sure the Nucleus Service is shared.

  2. Activate the User Management mode.

  3. Right-click in the users listing and choose “Create User” from the context menu.

  4. Once the user is created click the “Invite user” button in the details panel. A link to a registration page will be copied to the clipboard. Anyone with the link can access the registration page so send the link in a private message to the user.

The link will take the user to a login page where a password can be set.

Nucleus Web Invited User Login

Known Issues

Assigning a user to groups prior to inviting the user enables the administrator to control how the user is able to access content upon joining the server. With this version of Nucleus there is a known issue with that approach:

If an administrator creates a new user and assigns this user to a group before the user has authenticated once, the administrator will also have to manually assign this user to the “users” group. Failing to do so will result in the user not seeing any contents on your shared server.

To work around the issue:

  1. Navigate to User Management.

  2. Select the Users item.

  3. In the list of users - select the user you created.

  4. In the pane on the right displaying the user details, locate the “Assigned Groups” section.

  5. Enter “users” in the “Add group” field and click the plus sign.

This will allow the user to see contents on the server.


This problem can easily be avoided by creating the user and allowing them to log in prior to adding them to additional groups.

Admins can generate invite and file URLs for other users to open. There is a known issue with this:

Invite/file URLs generated in localhost:34080 cannot be opened by non-local users. If they try to open these URLs from their own machines, they will not work.

To work around the issue:

  1. In a web browser, an admin connects to <Nucleus IP Address>:34080 instead of localhost:34080

  2. Generate the URL; Copy URL for files and folders, or Invite User from within User Management

This will generate a link that non-local users can open.

Reset Password

If a user forgets the password (or just wants to change it) an administrator can generate a link by using the Reset password button. This works the same as the invitation process: the user will be taken to a page where a new password can be set and then access the server again.

Anyone with the link can access the password reset page so send the link in a private message to the user.

Grant Admin Access

Having admin access means having full access to all content and being able to access User Management features.

Use the “Grant admin access” button in the account details panel to grant or revoke this level of access. This

Enable/Disable Account

When account should no longer have access it can be disabled. File metadata will still indicate the user as the creator or most recent user to have modified a file where applicable.

Should the account need to be accessed again it can be re-enabled.

  1. Select the user in the Users listing.

  2. Toggle the enabled state with the Disable/Enable button.

User Groups

Many users can be combined into groups. This is especially helpful when managing permissions.


The GM Group (General Management) is the group containing users with Administrator level permissions.

This group is created automatically, and these users will have the ability to

  • Add and remove users from Nucleus

  • Create, Delete, and Modify User Groups on Nucleus

  • Modify ACLs on any path on Nucleus

  • Delete, Rename or Move any path on Nucleus

  • Create root level directories or files on Nucleus

Create Group

Right click on Groups and select Add Group in the context menu. Provide a name.

(Navigator 3.4)

Nucleus Web Groups

Nucleus Web Groups

(Navigator 3.3 and below)

Nucleus Web Groups

Modify Group Membership

New groups are empty. Select the group and start typing the name of a user in the Add User field in the detail panel. A list will appear. Select a user and click the plus/add button in the field.

Remove a user by clicking the delete icon next to the username in the “Assigned Users” list.

Nucleus Web Modify Group

Restore Access

Use these options if the administrator of a workstation server loose access by forgetting the password.

Ask Other Admin for Help

One admin can reset the password for another admin. This is by far the easiest way to restore access: Reset Password

Use a System Account

  1. Locate the Nucleus installation directory. If Nucleus was installed via the Omniverse Launcher then look at the Launcher’s “Settings” window and the “Library” path.

  2. Once in the installation directory, browse for “collaboration/nucleus-workstation [version]/Auth/configs/users.default.json”.

  3. Open this file in a text editor and look at the list of credentials. Try using the credentials to gain access and then reset the “admin” account password in the browser.

Service Accounts

If a Nucleus service account is required on an Enterprise Nucleus Server for an automated task or process, follow the steps below.


You can enable Service Accounts to use API Tokens instead of usernames and passwords. If this is required, refer to the API Tokens documentation for further information.

Service Accounts using Nucleus Authentication

  1. Log into your Enterprise Nucleus Server using an account with admin access.

  2. Add the user (service) account within the User Management panel using the desired user name (i.e., svc_app_registry).

  3. Once the user is added, click the user, then click Invite User which will copy a unique invitation URL to the clipboard.

  4. Open an incognito/private browser window, then paste the invitation URL into the address bar and press enter.

  5. When prompted, enter and confirm the desired password and click Log In. This will complete the creation of the user.

  6. Close the incognito/private browser window and using the original browser window, grant admin or other access rights as needed for this account.

Service Accounts using Single Sign-On Authentication

  1. Create the user (i.e., svc_app_registry) within your identity system (i.e., Active Directory) and set the desired password.

  2. Log into your Enterprise Nucleus Server using this user’s credentials. This will complete the creation of the user.

  3. Log out of this account, then log in using an account with admin access.

  4. Open the User Management panel, then click the user and grant admin or other access rights as needed for this account.

Auth Database Management

The database with all the user accounts is managed by Nucleus Authentication Service. It contains all accounts and credentials.

Groups memberships are managed and stored by Nucleus Core.

  • For Nucleus Workstation, the files are located in the Auth sub-directory within the data directory.

  • For an Enterprise Nucleus Server, the files are located in the local-accounts-db sub-directory within the data directory. (If using the recommended paths, the data directory is /var/lib/omni/nucleus-data/.)

Deleting the Auth Database


Using this method could result in data loss, so use this only as a last resort.

Nucleus Enterprise Server

  1. Stop all Docker containers on the server.

  2. Locate, back up (if desired), and delete the database.

  3. Restart the Docker containers on the server. The omniverse account is reset back to the default password as configured during the initial set up.

Nucleus Workstation

  1. Use the System Monitor to stop the “Nucleus” and “Auth” service.

  2. Locate the Launcher data folder. This is available in the Launcher’s “Settings” window.

  3. Once in the data folder, locate the file ./data/Auth/db.sqlite, then make a back up (if desired), and delete the file.

  4. Use the System Monitor to start the Nucleus and Auth service.

  5. At this point the admin account should be have its default admin password again.

  6. Verify that other accounts are able to access the server as before.