401 Unauthorized wanchai-ftpbucket

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
    CURLOPT_URL => 'https://bitbucket.org/!api/2.0/repositories/test7_wanchai/test-indent/src/0a97dd980bd80b68270bbe64bbf1fc30fd409c33/dummy-100.txt',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => '',
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 0,
    CURLOPT_FOLLOWLOCATION => false,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => 'GET',
    CURLOPT_USERPWD => 'test7_wanchai:nRa2j7LLt7au7uJMLzcT',
));

$response = curl_exec($curl);
$http_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$curl_error = curl_error($curl);
curl_close($curl);

if ($http_code != 200) {
    echo "error code : ' . $http_code . ' - cURL error: ' . $curl_error";
} else {
    echo $response;
}