* Add ability for App Services to register users
AS Tokens are pulled from their respective configs, which are then
checked against when an AS tries to register using
m.login.application_service. If the token exists and the new username is
within their specified namespace, then the user is created as a
password-less user.
Signed-off-by: Andrew Morgan (https://amorgan.xyz) <andrew@amorgan.xyz>
* Validate loaded Application Services
* Ensure no two app services have the same token or ID
* Check namespaces are valid regex
* Ensure users can't register inside an exclusive app service namespace
* Ensure exclusive app service namespaces are exclusive with each other
* Precompile application service namespace regexes so we don't need to
do so every time a user is registered
Signed-off-by: Andrew Morgan (https://amorgan.xyz) <andrew@amorgan.xyz>
When registering a new user using POST `/_matrix/client/r0/register`, the server was returning a 500 error when user name was already taken.
I added a check in `completeRegistration` to verify if the username is available before inserting it, and return a 400 `M_USER_IN_USE` error if there is a conflict, as [defined in matrix-doc](https://matrix.org/speculator/spec/HEAD/client_server/unstable.html#post-matrix-client-r0-register)
Signed-off-by: Thibaut CHARLES cromfr@gmail.com
