Where can requirements be obtained if there is no documentation?

• Product Owner (PO) / Product Manager (PM)
• Developers
• Business Analysts
• UX/UI Designers
• End Users
• Technical Support

• Studying the current version of the product (if available)
• Viewing logs and usage metrics

// Example of studying code to understand business logic
public User createUser(String username, String password) {
    // User creation logic
    if (userRepository.findByUsername(username) != null) {
        throw new DuplicateUserException("User already exists");
    }
    User user = new User(username, password);
    return userRepository.save(user);
}

# Studying code to understand data processing
def process_data(data):
    # Filtering and transforming data
    filtered_data = [item for item in data if item['status'] == 'active']
    transformed_data = [{"id": d['id'], "value": d['amount'] * 1.1} for d in filtered_data]
    return transformed_data

• User Stories
• Tasks
• Bugs with descriptions of expected behavior