Adding unauthorized hosts breaks code

[DanielWarshofsky]

Comment in the notebook section 1 claims that "Adding other hosts will not break the code". This is not true, the code should handle unauthorized hosts gracefully. Current workaround is to just remove unauthorized hosts from the config file.

[DanielWarshofsky]

add functionality for different user names and passwords

[DanielWarshofsky]

Functionality for different credentials for each host added b360c9e