### Your praw.ini file:
[name_in_prawini]
username = username
password = password
client_id = client_id
client_secret = client_secret
### end of praw.ini

### authenticate function
def authenticate():
    print("Authenticating")
    reddit = praw.Reddit('name_in_prawini', user_agent="description")
    print(f"Authenticated as {reddit.user.me()}")
    return reddit