auth:login retrieves the token via the API instead of copy+paste

[acidjazz]

• [x] add a request endpoint that results in a unique id for the CLI
• [x] pass that as the url to prompt and/or open instead of the previous
• [x] test the token upon retrieval and continue

[acidjazz]

1. cli hits an endpoint that returns a unique id related to the request
2. cli hits another endpoint awaiting the result of the request
3. cli presents/prompts a url to authorize this request with a unique id
4. authorized endpoint approving the request results in a token being handed back to the cli

[acidjazz]