Use the Telebox adder
You have two options for using the adder, the first is simple but buggy, the other is the application on cmd and it's a command line to type, but it works perfectly.
First option
Load users
This option is very simple, you need to connect your account as the scraper process.
Then you need to load a list of users, the file may look like users.csv.

Load groups
Next, load the group to which you wish to add all the users on your list.
Select speed
For better management you can select the speed recomandation, Very slow, Normal, Fast, Very fast.
- Use at your own risk, the documentation recommand 50 adds per day & per account.
- If the account get banned or tempbanned (just too much requests, so Telegram disable it to perform any add for ~16hours) there is a swapper account method in the code that switch without interrupting the process.

Finally, you can click on Add members and the application freezes....
This is because my code is terrible and the main process is running and blocking the application thread.
Don't worry, the main process works in the background.
Second option (best)
To open the terminal option, simply click on open terminal.
Launch the terminal
The first things you need to do is checking if you are in a virtual environnement (.venv) in front of the command.
If it's not the case, activate it :
.venv\Script\activate
Then start the script.
python telebox\telebox_adder_cmd.py

Name account
Enter the name of the account that will manage members adds.

Select file
Select a csv file with full of users.

Select group
Select a group or a channel where you want to add people.

Select speed
Change how fast you want to put for the adding process.
Type the same text as suggested for the speed, otherwise it won't be recognized.
Add members !
Now enjoy you're new members.
You may not be able to add certain users because they are blocked by the privacy policy, or simply because an error has occurred with the Telegram server.
