Set PHP Soapclient custom parameters

Question

I am consuming an external webservice via PHP and the same requests authentication in a different way, the login and password has to be passed within XML. But I can’t authenticate.

The call for service is being created the way below.

public static function myFunction ($param){

        $soapClient = new \SoapClient('my_wsdl', [
            "trace"     => 1,
            "exception" => 0,
            'Login' => '*',
            'Senha' => '*'
        ]);

        return($soapClient->myService($param));
}

The service expects an XML as below:

<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:api="meu_endereco_api">
   <soapenv:Header>
   <Autenticacao>   
        <Login>*****</Login>
        <Password>****</Senha>
   </Autenticacao>
   </soapenv:Header>
   <soapenv:Body>
      <api:minha_api soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <meu_parametro xsi:type="xsd:string">$param</meu_parametro>
      </api:minha_api>
   </soapenv:Body>
</soapenv:Envelope>

The service returns me authentication error:

object(stdClass)[783]
  public 'Parametro' => string 'ERRO NAO AUTENTICADO'

Does anyone have any idea how to send the authenticated request the parameters in this expected format?