Hello @tshahab , Thanks for reaching out to us!
- How many numbers of estimated users (any range ?) are you planning to add?
- Which one do you prefer, adding bulk users from IoT Central portal itself or via programmatically?
Right now we have REST API to add a user, please see Add or update an email user
Please refer to complete documentation on Azure IoT Central REST API reference
Steps: Quickly test this REST API via Postman
Generate the API token from your IoT Central Portal: you can also read this generated token via the REST API call
Make use of Postman PUT call to add the user.