Update/clear cached configuration

In our product we allow the customer to create the SAML configuration through the UI. We store it in our database (this was converted from the old CS ASP.NET Saml implementation), but it is not using the SamlDatabaseConfigurationResolver. Basically, the create works fine, but if we need to make an updates, the changes can’t be tested until we clear/update the configuration cache. I read the docs and attempted to use the IOptionsSnapshot samlConfigurations sample but seems like I need to set the values manually (the “samlConfigurations.Value” is a read only property.
Is there any way to just update the cached configuration by setting the full SamlConfiguration object to the cached object?
In the old ASP.NET version we used to just do this assignment:
SAMLController.Configuration = _samlConfiguration

Is there anything similar to this in the .Net core version?
Thanks!