> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snowray/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snowray/v2.6/reference/access.md).

# Access management

Authors maintaining [resources](/snowray/v2.6/reference/resources.md) might need to restrict the accessibility of those. Snowray provides different types of roles to define which user is allowed to perform an action or to see a specific resource. Besides specifying roles for individual users, it is also possible to determine groups of users with associated roles. A more detailed description of user role permissions can be found [below](#user-roles-and-permissions).

![User Role Permissions](https://4076728468-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FYncNRdo6X7dqido4suUT%2Fuploads%2Focsz6FoD1tnWyrCwWCoD%2Fuser_roles.png?alt=media)

### :busts\_in\_silhouette: User Roles and Permissions

|              |                **Read**               |               **Write**               |             **Administrator**             |
| ------------ | :-----------------------------------: | :-----------------------------------: | :---------------------------------------: |
| **Export**   | Export shared resources in any format | Export shared resources in any format |   Export shared resources in any format   |
| **Browse**   |        Browse shared resources        |        Browse shared resources        |          Browse shared resources          |
| **Edit**     |                   -                   |          Edit shared content          | Edit shared resource metadata and content |
| **Create**   |                   -                   |            Create resources           |              Create resources             |
| **Release**  |                   -                   |                   -                   |              Create releases              |
| **Share**    |                   -                   |                   -                   |         Manage access of resources        |
| **Settings** |                   -                   |                   -                   |         Delete or retire resources        |

Administrators can share resources, edit individual user or group roles, and revoke access to resources after visiting the *Sharing* tab of the selected resource. More can be found on these topics under the following pages:

{% content-ref url="/pages/-MjEhf9epLGp7erCI3FO" %}
[Sharing Resources](/snowray/v2.6/reference/access/sharing-resources.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MjEhmMMNKFIFZo\_6wdk" %}
[Change Roles](/snowray/v2.6/reference/access/change-roles.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MjEhshapSPo6dsAWsKZ" %}
[Revoke Access](/snowray/v2.6/reference/access/revoke-access.md)
{% endcontent-ref %}

{% hint style="info" %}
Resources only appear for users who are granted access to them, including administrator users. 
{% endhint %}

User roles are restricted to resources. A user can have different types of permissions to different resources and can have multiple roles if they are present in a group with permission to the resource as well.

{% hint style="info" %}
When having multiple roles, the role with the higher accessibility feature will always be the one taken into consideration when trying to access a resource.
{% endhint %}