What do the different user icons mean?
- Standard user icon (no particular attribute).
- The user is in away mode.
- The user represents a bot the hub uses to issue automatic commands.
- Red bricks
- The user cannot be connected to, for he is in passive mode and does not
support NAT traversal.
- Red circle
- The user has no free slot available.
- Yellow key
- The user is a hub operator.