Trying to access a key within a map list

Hi, I’m new to elixir.

Currently I find myself needing to access a value but due to ignorance I have not been able to, the structure I have is the following and the value I want to access is “detail” => "Error desconocido, I appreciate your collaboration, thank.

%{
    "data" => nil,
    "errors" => [%{
            "code" => "ER404-NN",
            "detail" => "Error desconocido",
            "id" => "9eae1b20-56f5-11ed-859c-0250f209cfd1",
            "status" => 400,
            "title" => "Operación fallida"
        }
    ],
    "message" => nil,
    "meta" => %{
        "clientRequest" => "",
        "messageId" => "",
        "requestDate" => "28/10/2022 14:20:44:748000",
        "responseSize" => 1
    }
}