Me neither…
Start by adding;
logger:
default: warning
logs:
homeassistant.components.media_player.spotify: info
in configuration.yaml.
Things like 2017-11-06 21:08:56 INFO (Thread-3) [homeassistant.components.media_player.spotify] New Devices: {‘Gymmet’: ‘f610e96da0fe902ced9fc1e98df9b034be7ff0’, ‘Kitchen’: ‘c6aaa3f93b39016a6a2e74ef34f042caee2d3e’} will appear in the log. Those are your aliases.