Security can mean a lot of things in a Mendix app. If you want to toggle the Security Level, there is a menu to do that in the project explorer as explained here:
However, you will not be able to deploy your app to a licensed cloud node unless production is enabled and set to ‘Production.’ Security is an essential part of any live app. However, there are options to disable security if you just want to test something. Those options are in the link above.
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