Extract key, value from nested maps or list of maps

nested.exs

defmodule Nested do

def get_inner_element(input) do
Enum.at(input,0) 
    |> __MODULE__.get_map(["accessConfigs"] )
    |>Enum.at(0) 
    |> __MODULE__.get_element_from_map("natIP")
end
def get_map(map,[head|tail])  do
 map[head] |> get_map tail 
end

def get_map(map,[]),  do: map 

def get_element_from_map(map,key) do
map[key]
end
end
########
input = [%{"accessConfigs" => [%{"kind" => "compute#accessConfig",
         "name" => "External NAT", "natIP" => "146.148.23.208",
         "type" => "ONE_TO_ONE_NAT"}]}]
         
         
IO.inspect get_inner_element(input)

### result= "146.148.23.208"