URL in Firebase

I want to use the node of Firebase, but I have a problem. In Firebase, when I create a Realtime Database, it generates a URL of the database finished in "". And them, when I'm introducing it in the node, here is the problem, because the only way to introduce an URL of a database is if is finished in "".
I don't know if the problem is in the creation of the database, or in the own node.