Assuming the course author has actually set the value of
_components._textConfirmation.Database (either via the authoring tool or manually via course.json if using the framework) then
Adapt.course.get('_globals')._components._textConfirmation.Database should contain the value they entered.
I would recommend you use the developer tools to do a bit of exploration... if you execute
var Adapt = require('core/js/adapt'); in the Console you will then be able to run
Adapt.course.get('_globals')._components in the console to have a proper look around.
Equally you can use the debugger to add a breakpoint in your text confirmation component, allowing you to explore that in more detail.
I recommend you do all this in the framework - it's a lot easier getting new functionality like this working in there first. Once that's done, upload the plugin to the authoring tool and check it works there.