Make userapi control account creation entirely (#1139)

This makes a chokepoint with which we can finally fix
'database is locked' errors on sqlite during account creation

clientapi/auth/authtypes/account.go

@@ -1,31 +0,0 @@
-// Copyright 2017 Vector Creations Ltd
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package authtypes
-
-import (
-	"github.com/matrix-org/gomatrixserverlib"
-)
-
-// Account represents a Matrix account on this home server.
-type Account struct {
-	UserID       string
-	Localpart    string
-	ServerName   gomatrixserverlib.ServerName
-	Profile      *Profile
-	AppServiceID string
-	// TODO: Other flags like IsAdmin, IsGuest
-	// TODO: Devices
-	// TODO: Associations (e.g. with application services)
-}