Login with https://host/users/me/ format

Following #73 , I should also be able to provide a OP hosted on another DjangoLDP server and login with it

mentioned in issue #43 (closed)

mentioned in issue management/core-team#3

mentioned in issue framework/sib-auth#41 (closed)

mentioned in issue management/core-team#16

mentioned in issue framework/sib-auth#43

unassigned @calummackervoy

changed title from Cannot login with https://host/users/me/ format to Login with https://host/users/me/ format

changed the description