How to make alert with name of child firebase?

@_Ali94 wrote:

Hi every body

I need to show aler with text like "Welcome USER1".
USER1 is a value that stored in firebase database.

My tree like this

in my .ts file i used this way to get the data

public usersList: FirebaseListObservable<any>;
...

constructor(..., public afd: AngularFireDatabase) {}

showWelcome(){
this.usersList = this.afd.list('/users/');
...
}

So any body know how I can display the fname in alert ?

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