Solution:
You should use CURL for it.
function name_of_the_function(Request $request){
$url = "http://127.0.0.1:8000/api/login?username=".$request->username."&password=".$request->password;
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt( $ch, CURLOPT_HTTPHEADER, array('Content-Type:application/json'));
$err = curl_error($ch);
$response = curl_exec($ch);
if ($err) {
echo "cURL Error #:" . $err;
}
curl_close($ch);
return $response;
}