Is there an idiomatic way in Elixir to write a case guard to pattern match on the value of a key inside a Keyword List?

The keyword list has an arbitrary number of keywords, so matching agains the entire list is not an option.

The best we can come up with is a nested case statement to match against Keyword.get, is there a cleaner way?

# Contrived example for discussion purposes.
def run_something(args) do 
  
  # calculate_something returns:
  #   {:ok, response}
  #   {error, [message: string, code: atom, ...] }

  case calculate_something(args) do
    {:ok, response} -> 
      response

    # How do you perform such a pattern match? 
    {:error, reason} when Keyword.get(reason, code:) == :timeout -> 
      # Maybe try again? 

    {:error, reason} when Keyword.get(reason, code:) == :auth_failed -> 
      # Maybe try to re-authenticate? 
    
    {:error, reason } -> 
      # Unknown reason, abort.
  end
end