Add setting to disable user registration

README.md

@@ -4,7 +4,16 @@ Automatically create accounts in bulk, and export a report to .CSV or .HTML. Fro
 
 License: MIT
 
-## Show the GUI
+## Settings
+
+* `accountmgr.allow_user_register`: Default true. If enabled, users can create
+  an account. Setting this to false is desirable when you're using bulk account
+  creation and don't want users to be able to create their own accounts.
+
+
+## Bulk Account Creation
+
+### Show the GUI
 
 Grant yourself the server privilege, and then run the chatcommand:
 
@@ -12,7 +21,7 @@ Grant yourself the server privilege, and then run the chatcommand:
 	/accounts
 
 
-## Importing
+### Importing
 
 You can import users from a .csv file by placing it in the world directory,
 selecting it in the "Import from CSV" list, and clicking import.
@@ -30,7 +39,7 @@ Or you can also include privileges and notes:
 Notes are freeform text, and will appear in the account report
 
 
-## Editing Users
+### Editing Users
 
 When you click "Save" in the Create/Update section, it'll copy the fields into
 the user list. If the user exists, it'll be overridden. Otherwise, a new user
@@ -44,7 +53,7 @@ click save.
 Clicking Delete will delete the user with the given name.
 
 
-## Exporting
+### Exporting
 
 Click "Create Accounts" to create/update the users and generate the reports.
 

init.lua

@@ -1,3 +1,5 @@
+local S = minetest.get_translator("accountmgr")
+
 local bulk_create_dialog = dofile(minetest.get_modpath("accountmgr") .. "/bulk_create.lua")
 
 minetest.register_chatcommand("accounts", {
@@ -11,3 +13,16 @@ minetest.register_chatcommand("accounts", {
 		return true
 	end,
 })
+
+
+minetest.register_on_prejoinplayer(function(name, ip)
+	local allow_user_register = minetest.settings:get_bool("accountmgr.allow_user_register", true)
+	if allow_user_register then
+		return
+	end
+
+	local handler = minetest.get_auth_handler()
+	if not handler.get_auth(name) then
+		return S("User not found, registration is closed on this server")
+	end
+end)

settingtypes.txt

@@ -0,0 +1,4 @@
+#    If enabled, users can create an account. Setting this to false is desirable
+#    when you're using bulk account creation and don't want users to be able to
+#    create their own accounts.
+accountmgr.allow_user_register (Allow Users to Register) bool true