Module login 

Login command implementation

Functions

get_ollama_client

Get Ollama client if configured

get_preferred_provider

Get the preferred provider (Anthropic > Google > Ollama)

is_authenticated

Check if user is authenticated with any provider (including Ollama)

is_ollama_configured

Check if Ollama is configured as the provider

logout

Run the logout command - remove all stored credentials

run

Run the login command - let user choose provider with arrow keys