We have a use case where we need to provide a registration form to anonymous users for those who want to create an account in our Appian application.
Our initial thought process was to create a custom servlet for this requirement which would call Web API exposed from our Appian application, triggering a process which would then create an Appian user. The Appian documentation says, "You can allow unauthenticated access to your servlet by adding your custom servlet plug-in to the Spring Security Unsecured List." However, this is prohibited in all Appian cloud environments. Since the registration form shouldn't have any authentication around it(open to all) and our environment is in the cloud, we couldn't proceed further with this idea.
https://docs.appian.com/suite/help/17.4/Custom_Servlet_Plug-ins.html#authentication-and-authorization
Now we are thinking to create a very small web application which would handle the requests for creating an Appian user account for anonymous users and has no authentication. When we could deploy it alongside Appian application on JBoss, our requirement is fulfilled. But just wanted if Appian allows this especially in the cloud.
Note: We can't get hold of a different server to deploy this tiny web application for whatsoever reasons.
Also, please let me know if there is any other better approach to handle this use case with our limitations in place.
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