https://apitest.dhlecommerce.asia/rest/v1/OAuth/AccessToken?clientId=LTExMTgwNTI4MTY=&password=APITest1&returnFormat=json

array(1) {
  ["accessTokenResponse"]=>
  array(5) {
    ["token"]=>
    string(32) "38aa463223cf4d53afc764bde2eccbce"
    ["token_type"]=>
    string(6) "Bearer"
    ["expires_in_seconds"]=>
    string(5) "80274"
    ["client_id"]=>
    string(16) "LTExMTgwNTI4MTY="
    ["responseStatus"]=>
    array(3) {
      ["code"]=>
      string(6) "100000"
      ["message"]=>
      string(40) "Service operation completed successfully"
      ["messageDetails"]=>
      string(22) "Access token assigned."
    }
  }
}

string(32) "38aa463223cf4d53afc764bde2eccbce"

NULL