Add traps; user registration

app/routing/routers/api/v1/auth.routes.js

@@ -40,6 +40,14 @@ const auth_routes = {
             'controller::api:v1:Auth.validate_username'
         ],
 
+        '/validate/user_exists': [
+            'controller::api:v1:Auth.user_exists',
+        ],
+
+        '/validate/email': [
+            'controller::api:v1:Auth.validate_email',
+        ],
+
         '/attempt': [
             'controller::api:v1:Auth.attempt'
         ],
@@ -77,6 +85,12 @@ const auth_routes = {
             ['middleware::api:Permission', { check: 'v1:auth:users:create' }],
             'controller::api:v1:Auth.create_user',
         ],
+
+        '/registration': [
+            ['middleware::util:Setting', { key: 'auth.allow_registration' }],
+            'middleware::auth:GuestOnly',
+            'controller::api:v1:Auth.registration',
+        ],
     },
 
     patch: {