Firebase db tag list

hello dear community. there is not tag list block in firebase db? how can use this function?

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thank you very much! your replies are life saver!

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hello again. your answer works great with json lists which root nodes (tags) are known and i can get value with object block. but if i dont know root nodes? for example i have Users tag and user IDs under it, how can i get ID list?

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I just had FB save another list. USERS/*theirUsername/"" (last part is just “” so when I call the tag USERS the data comes back like this {“username1”,"",“username2”,""} and so on. The tag results go into a list separated by , and then I parse the data into another list. I remove all of the { } " and that gives me all of my usernames to ensure they arent already taken. Hope that sorta helps.

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Ä° will try this method, thank you very much