I have this firebase database
and i need to get all phone numbers of users , which listener shall i use to get all childes?
Every user is added as an object with user-ID as a name of that object, I need to retrieve this objects without knowing that user-ID
I searched the documentation , it's related to DataSnapshot but i couldn't get a DataSnapshot without a listener ! is it correct to seek a DataSnapshout or shall i use something else
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