# 1. Import `csv` and `os` modules. # 2. Create a dummy CSV file if it doesn't exist (to ensure code runs). # 3. Initialize `total` and `count` variables. # 4. Open the CSV file in read mode. # 5. Use ...
# 2. Define `/register` route (POST). # - Get JSON. # - Validate presence of data. # - Validate `username` length. # - Validate `email` format. # - Validate `age ...