Luke Barnard 34ed4f4206 Implement username availability checker ... Outlined here: https://github.com/vector-im/riot-web/issues/3605#issuecomment-298679388 ```HTTP GET /_matrix/.../register/available { "username": "desiredlocalpart123" } ``` If available, the response looks like ```HTTP HTTP/1.1 200 OK { "available": true } ``` Otherwise, ```HTTP HTTP/1.1 429 { "errcode": "M_LIMIT_EXCEEDED", "error": "Too Many Requests", "retry_after_ms": 2000 } ``` or ```HTTP HTTP/1.1 400 { "errcode": "M_USER_IN_USE", "error": "User ID already taken." } ``` or ```HTTP HTTP/1.1 400 { "errcode": "M_INVALID_USERNAME", "error": "Some reason for username being invalid" } ```		2017-05-03 12:04:12 +01:00
..
v1	Merge pull request #2130 from APwhitehat/roomexists	2017-04-27 09:20:26 +01:00
v2_alpha	Implement username availability checker	2017-05-03 12:04:12 +01:00
__init__.py	copyrights	2016-01-07 04:26:29 +00:00
transactions.py	Ordering is important on errbacks so add the cleanup func before creating an ObservableDeferred	2017-02-13 13:49:44 +00:00
versions.py	Add r0.1.0 to the "supported versions" list	2016-07-28 10:14:07 +01:00