Fixed signups and oauth buttons now only show if enabled

The signup form now works and the oauth buttons are only visible if they have been enabled in the settings.json file

config/example-settings.json

@@ -2,12 +2,12 @@
     "branding":{
         "name":"AiThingy"
     },
-    "auth_mode":"code",
+    "signup_mode":"code",
     "default_role":"none",
     "default_permissions":[
         "createChat"
     ],
-    "auth_codes":[
+    "signup_codes":[
         {
             "name":"code1",
             "code":"a1b2c3",
@@ -29,5 +29,6 @@
         "enabled":"true",
         "client_id":"client_id",
         "client_secret":"client_secret"
-    }
+    },
+    "mongo_password":"yourMongoPassword"
 }