The alpha importer currently dies with:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/runpy.py", line 193, in _run_module_as_main
"_main_", mod_spec)
File "/usr/local/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/code/listenbrainz/listenbrainz/alpha_importer.py", line 234, in <module>
import_from_alpha(username, token)
File "/code/listenbrainz/listenbrainz/alpha_importer.py", line 193, in import_from_alpha
next_max = data['payload'][-1]['listened_at']
IndexError: list index out of range