RADIUS functions and utilities

[mtnocean]

Hi,
I've written some code for setting RADIUS usernames and passwords along with some demo Python code. Please tell me if you would like me to submit a pull request.
Paul

https://github.com/mtnocean/pyunifi/tree/radius

functions:

• get_radius_users(self)
• add_radius_user(self, name, password)
• update_radius_user(self, name, password, id)
• delete_radius_user(self, id)

support functions for delete_radius_user():

• _delete(self, url, params=None)
• _api_delete(self, url, params=None)

utilities:

• unifi-ls-radius - lists all usernames/passwords
• unifi-save-radius - saves all usernames/passwords to a .csv file
• unifi-copy-radius - copies all usernames/passwords from one site to another

in progress:

• unifi-upload-radius - uploads a .csv file of usernames/passwords to a site

[finish06]

@mtnocean Indeed. Please submit a PR. I will look it all over, and check everything out. Have a great day.