Sample Code - SmartSDK

If I have Custom Authentication enabled and configured, I am unable to send prints from computers to the printer, not even test pages, how can I enable this without having to remove Custom Authentication?

How do I ensure that the user logged in through my application has permission to access the view of all applications on the device by clicking this button as shown in the image. Because after logging in, when I click on this button, nothing happens, as if he didn't have permission to access this area. Is there any way for me to change the logged in user's permission so that they can access the applications through this button?

When I try to open the application it gets a black screen and the application doesn't open, and it doesn't generate any errors in the logs, I just click on the application and it gets a black screen and nothing else, do you know what it could be?

Is there any way I can save the data in memory and have it seen by another application? I need to save some information in memory, so that after restarting the equipment, it remains in memory, but I will save it with one application, and search with another, is it possible? How to do this, and in which place should I save so that both have vision, and what methods should I use to do this?

How can I check which user is logged in to the device? And what information can I extract from this logged in user? Can I collect his name and logged in username? Can you show me a code example of how to find out the user logged into the equipment through an embedded application?

I'm using CustomAuthSample as a base, how does controlling the screens to be displayed on it work? Because I want to create a new screen and display it, but I don't understand how to call this screen... At no point in the code did I notice being informed which screen will be shown to the user, despite this application having several screens created . Including the login screen, the application starts there, but how does it know that it needs to start on this screen, if this is never declared in the code?

Is there any way through the code to make a standard waiting message displayed on the screen? Because I'm creating the application's Custom Login screen, but I need to wait for the connection to the network to show the screen, is it possible to show some warning on the screen for the user to wait, and as soon as I get a connection, I remove this temporary screen and show my login screen, is there an easy method to do this by code?

I noticed that the equipment takes a while to upload the network and access the internet, it takes a few seconds, but it still interferes with the use of my application. Is there any way through the code that I can check its connectivity? So that I can only start everything after it has connected to the internet, so I can even inform the user to wait a bit.

I need to save values ​​in the equipment's memory, so that after the equipment is restarted I don't lose these values ​​and can retrieve them from memory. It's possible? How can I carry out this procedure? Can you show me an example code?

How do I make HTTP requests correctly? Because I'm trying to make a GET request using HttpURLConnection, but it's not returning the success of the request, but I also couldn't capture the error. Is there any configuration I need to do on the equipment so that it allows requests to be made from it?