Supported identifier types
Maigret can search against not only ordinary usernames, but also through certain common identifiers. There is a list of all currently supported identifiers.
gaia_id - Google inner numeric user identifier, in former times was placed in a Google Plus account URL.
steam_id - Steam inner numeric user identifier.
wikimapia_uid - Wikimapia.org inner numeric user identifier.
uidme_uguid - uID.me inner numeric user identifier.
yandex_public_id - Yandex sites inner letter user identifier. See also: YaSeeker.
vk_id - VK.com inner numeric user identifier.
ok_id - OK.ru inner numeric user identifier.
yelp_userid - Yelp inner user identifier.