The tiled.client.context.Context object currently has a generic repr:

>>> client.context
<tiled.client.context.Context at 0x7ff6400a7490>

I think a good use of this would be to display authentication-related state. The Context handles the API key (if set) or the tiled.client.auth.TiledAuth object that manages refresh flow. It's in a good position to display, as applicable, the first eight characters of the API key:

>>> client.context
<Context api_key="abcdef12...">

or the username:

>>> client.context
<Context id="dallan">

or else:

>>> client.context
<Context unauthenticated>