//Authentication rest API magento2.Please change url accordingly your url
$adminUrl='http://localhost/index.php/rest/V1/integration/admin/token';
$ch = curl_init();
$data = array("username" => "wsname", "password" => "m7Craqa5");
$data_string = json_encode($data);
$ch = curl_init($adminUrl);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json',
'Content-Length: ' . strlen($data_string))
);
$token = curl_exec($ch);
$token= json_decode($token);
$ch = curl_init("http://localhost/index.php/rest/V1/customers/1");
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json", "Authorization:Bearer " . $token));
$result = curl_exec($ch);
var_dump($result);
highlighted line is very important . Where I was making mistake was "not putting space after bearer"
