These methods are available on HTTPPasswordMgr and HTTPPasswordMgrWithDefaultRealm objects.
(user, passwd)
to be used as authentication tokens
when authentication for realm and a super-URI of any of the
given URIs is given.
(None, None)
if there is no matching user/password.
For HTTPPasswordMgrWithDefaultRealm objects, the realm
None
will be searched if the given realm has no matching
user/password.
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