# Authentication

You can control who accesses your deployments by changing it's Authentication.

<figure><img src="/files/N1LHdnJ0vzuHJSI76B1e" alt=""><figcaption><p>Authentication Options</p></figcaption></figure>

## Public

This option allows anyone to access your deployment

## Social

The viewer can login using their social credentials like Google or Facebook/Instagram account to access your experience

## Load from another experience

This allows you to link multiple deployments. Selecting this option makes this deployment visible in the “Open Deployment” rule while you build another experience.

{% content-ref url="/pages/3F6RRfdb409MbufJt75H" %}
[Load from another Experience](/metaverse/publishing/authentication/load-from-another-experience.md)
{% endcontent-ref %}

## Public with history

This option allows anyone to access your experience, but GMetri assigns a viewer id to track history. So when the same person accesses the experience again from the same device and browser, their variables or progress would remain intact.

## Advanced Authentication Mechanisms

There are a lot more authentication mechanisms you can use:

### SCORM

{% content-ref url="/pages/-Mgse-VB5YtYtymg\_J8c" %}
[Export as SCORM package](/metaverse/publishing/gmetri-experience-as-scorm-package.md)
{% endcontent-ref %}

{% hint style="info" %}
The authentication options below are available only for the enterprise tier
{% endhint %}

### SSO/SAML

{% content-ref url="/pages/WpUQRZpFORy8IwgqV7Bi" %}
[SSO](/metaverse/publishing/authentication/sso.md)
{% endcontent-ref %}

### Custom List

{% content-ref url="/pages/XIi6sHUe36nQdkWpFWI3" %}
[Custom List](/metaverse/publishing/authentication/custom-list.md)
{% endcontent-ref %}

### Token

{% content-ref url="/pages/4C1TxidwXw5QnWOM2T0x" %}
[Token](/metaverse/publishing/authentication/token.md)
{% endcontent-ref %}

### Password With Expiry

{% content-ref url="/pages/XwtcAFzyxwD7Izx0JKlQ" %}
[Password With Expiry](/metaverse/publishing/authentication/password-with-expiry.md)
{% endcontent-ref %}

### Email with OTP

{% content-ref url="/pages/cLrMECOA8lcPWOyjPLlB" %}
[Email with OTP](/metaverse/publishing/authentication/email-with-otp.md)
{% endcontent-ref %}

## Viewer Groups

Many of the above authentication mechanisms can be setup from the Viewer Group section.

<figure><img src="/files/hDPajOnjurapGPKSDTyg" alt=""><figcaption><p>Opening the Viewers Group page from the portal menu</p></figcaption></figure>

<figure><img src="/files/scKKhysZEOaMloP8mmnc" alt=""><figcaption><p>Viewer Groups</p></figcaption></figure>


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