Querying Child Nodes Based on a Particular Value (Swift 3, Firebase) - ios

Question

I am trying to pass a phone number (Ex. 1111111111) and see if it matches any of the entries in my Firebase Database. I am having problems sorting through the database and looking up the phone number. Below is the Firebase Database's JSON code.
{
"Users" : {
"3SMHwMuA8HQm9yLoivxYoCtUccr1" : {
"Email" : "firstname1.lastname1#gmail.com",
"First Name" : "First Name 1",
"Last Name" : "Last Name 1",
"Phone Number" : "[phone]"
},
"NvQiGzASw2QDAMcBQLx1HNzR8ZM2" : {
"Email" : "firstname2.lastname2#gmail.com",
"First Name" : "First Name 2",
"Last Name" : "First Name 2",
"Phone Number" : "[phone]"
},
"RuVMfHUC8qQg8KGVJitEkzq9Tsy2" : {
"Email" : "firstname3.lastname3#gmail.com",
"First Name" : "First Name 3",
"Last Name" : "Last Name 3",
"Phone Number" : "[phone]"
}
}
}
This is the code that I wrote. It is not giving the correct result.
phoneNumber: Int = 1111111111
ref = Database.database().reference()
let phoneNoInDatabase = ref.child("Users").queryEqual(toValue: phoneNo_pb_int)
let phoneNoInDatabaseInt = Int(phoneNoInDatabase.components(separatedBy: CharacterSet.decimalDigits.inverted).joined())
if phoneNoInDatabase_int == phoneNo_pb_int {
// Success!
print("User Found")
}
else {
// Error!
print("User not Found")
}

Answer 1

You're missing an instruction for what child to filter on:
let phoneNoInDatabase = ref.child("Users").queryOrdered(byChild: "Phone Number").queryEqual(toValue: phoneNo_pb_int)