[Wikimetrics] Unaccepted usernames when uploading to cohorts

Hi, I tried to upload the following list of usernames:

Opice1956 Rowerin Melanie anna Bonifac-cz Jistefi Bačkovská Lidabey NŠO-ČI Stana123 Pauza OmaOla Antonín Ryska Libuše Kroková VETA 7O Ilča53 Wlady Markéta z e Lhoty Klenča VlaMaul

I extracted this list of usernames from the ListStudents API. Strangely, three usernames are not valid when uploaded to Wikimetrics:

Jistefi invalid user_name Pauza invalid user_name VlaMaul invalid user_name Do you have any idea why these? The order of usernames does not seem to produce any difference, it is always these three.

thanks

Vojtěch Dostál

místopředseda Wikimedia Česká republika Konopišťská 790/3, Praha 10 http://www.wikimedia.cz