This function allows you to set the user key and token for API calls. You can either link to text files which contain the key and token, or you can leave the arguments blank and manually input the key and token when prompted
set_key_token(key_file = NULL, token_file = NULL, path = getwd())
The name of the file which contains the Trello key
The name of the file which contains the user token
The path to the location of the user token file