====== OTP authenticator for php ======
  - Create a python virtual environment in a location your web server can access:<code>cd /home/user/html
mkdir -p /home/user/html/pyotp-env
sudo chown user:www-data /home/user/html/pyotp-env
sudo chmod 770 /home/user/html/pyotp-env
</code>
  - Create a virtual environment as apache2 user and activate it:<code>sudo -s -u www-data
python3 -m venv /home/user/html/pyotp-env
source /home/user/html/pyotp-env/bin/activate</code>
  - Install pyotp:<code>pip3 install pyotp</code>
  - Create the python script ''/home/user/html/pyotp-env/otp.py'':<code># Python script to generate authenticator OTP
import pyotp

# Your Base32 secret key (provided when setting up 2FA)
secret = "ABCDE1FGHIJK2LMN" 

# Initialize TOTP
totp = pyotp.TOTP(secret)

# Generate the current 6-digit code
current_code = totp.now()
print(current_code)</code>
  - Check execution of pyotp:<code>python3 /home/user/html/pyotp-env/otp.py</code>
  - Create a bash script:<code>vim /home/user/html/otp.sh
#!/bin/bash
source /home/user/html/pyotp-env/bin/activate
python3 /home/user/html/pyotp-env/otp.py
deactivate
exit 0</code>
  - Create a php web page which calls the script:<code>vim /home/user/html/otptest.php
<?php
$output = shell_exec('/home/bco/html/otp.sh');
echo $output;</code>
  - Give the scripts correct ownership and permissions:<code>sudo chown www-data:www-data /home/bco/html/pyotp-env/otp.py
sudo chown www-data:www-data /home/bco/html/otp.sh
sudo chmod +x /home/bco/html/otp.sh</code>
  - In Synology, you can check the OTP like this:<code>synootp username=user code=otp-code</code>