If im using putty to access an ubuntu server, how do i run my python script while still being able to view other files?

Im trying to set up a webhook with learnworlds

Here is my setup:
Ubuntu 23.04 x64 server from vultr.com
URL from namescheap that redirects to the server ip
Within the server, i have a python script called webhook_server.py and an empty CSV
-The csv is supposed to be filled as the python script colects calls from learnworld.

Here is the code for webhoobhook_server.py

import csv
from flask import Flask, request, abort
import json
import hashlib
import logging

app = Flask(__name__)

EXPECTED_SIGNATURE = "{expected signiture, cut this out}"

CSV_FILE_PATH = "userData.csv"  # Path to the CSV file

# Configure logging
logging.basicConfig(filename='app.log', level=logging.INFO)

@app.route('/webhook', methods=['POST'])
def webhook():
    data = request.get_json()
    
    # Verify the webhook signature
    signature = hashlib.sha256(json.dumps(data).encode()).hexdigest()
    if signature != EXPECTED_SIGNATURE:
        abort(401)  # Return 401 Unauthorized status code if the signature does not match
    
    # Extract the webhook type
    webhook_type = data['type']
    
    if webhook_type == 'userUpdated':
        user_data = data['data']['user']
        user_id = user_data['id']
        
        # Search for matching ID in the CSV file
        csv_data = read_csv_file(CSV_FILE_PATH)
        matching_row = find_matching_row(csv_data, user_id)
        
        if matching_row:
            # Update existing line in CSV file
            updated_data = update_data(matching_row, user_data)
            write_csv_file(CSV_FILE_PATH, csv_data)
            logging.info(f"User data updated: {user_id}")
        else:
            # Append data to the end of the CSV file
            append_data_to_csv(CSV_FILE_PATH, user_data)
            logging.info(f"New user data appended: {user_id}")
    
    # Process or perform additional operations based on the webhook type
    
    # Return a response (optional)
    return 'Webhook received successfully'






def read_csv_file(file_path):
    """
    Read the contents of a CSV file and return the data as a list of dictionaries.
    """
    with open(file_path, 'r') as csv_file:
        reader = csv.DictReader(csv_file)
        data = list(reader)
    return data


def find_matching_row(data, user_id):
    """
    Find and return the row in the CSV data with a matching user ID.
    """
    for row in data:
        if row['id'] == user_id:
            return row
    return None


def update_data(row, new_data):
    """
    Update the existing row in the CSV data with the new data.
    """
    row.update(new_data)
    return row


def write_csv_file(file_path, data):
    """
    Write the data to a CSV file.
    """
    fieldnames = data[0].keys() if data else []
    with open(file_path, 'w', newline='') as csv_file:
        writer = csv.DictWriter(csv_file, fieldnames=fieldnames)
        writer.writeheader()
        writer.writerows(data)


def append_data_to_csv(file_path, new_data):
    """
    Append new data to the end of the CSV file.
    """
    with open(file_path, 'a', newline='') as csv_file:
        writer = csv.DictWriter(csv_file, fieldnames=new_data.keys())
        writer.writerow(new_data)


if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)

My problem:
I am able to runwebhook_server.py within the server but it doesnt change the CSV. in fact, i dont even know how to get to the python terminal so i could see any errors it throws up.
ChatGPT says my python code checks out (as far as i trust that:/) but the code doesnt seem to do anything.

Another issue, when i run the program, it doesnt let me do anything else. it gives me the option to "Press CTR:+C to quit" but i cant even look into the CSV without killing the flask server.

How do i get this running?