curl_setopt($process, CURLOPT_RETURNTRANSFER, true);
curl_setopt($process, CURLOPT_SSL_VERIFYPEER, false);

$params = array(
    'username' => $username,
    'password' => $password
);

$params_string = json_encode($params);

$process = curl_init($url);
curl_setopt($process, CURLOPT_RETURNTRANSFER, true);
curl_setopt($process, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($process, CURLOPT_POSTFIELDS, $params_string);

$headers = array();
$headers[] = 'Content-Type: application/json';
curl_setopt($process, CURLOPT_HTTPHEADER, $headers);

$data = curl_exec ($process);

curl_close ($process);

echo 'USERNAME: '${USERNAME}
echo 'PASSWORD: '${PASSWORD}

AUTHENTICATE_DATA="usename=${USERNAME}&password=${PASSWORD}"

AUTHENTICATE_RESPONSE=$(curl
  -X POST
  -H 'Content-Type: application/json'
  --data-urlencode "${AUTHENTICATE_DATA}"
  -v
  ${AUTHENTICATE_URL})

echo ${AUTHENTICATE_RESPONSE}