mod_auth_oauth_external: Allow different username in PLAIN vs final JID Mastodon for example having email addresses usernames in login, but a different username in the service itself. Thanks to @tcit@social.tcit.fr for the pointer to a usable validation endpoint for Mastodon, allowing this to be tested.

local actions = {};

function actions.auth(data)
	local user, host, pass = data:match("^([^:]+):([^:]+):(.+)$");
	if user == "someone" then
		return "1";
	end
end

for line in io.lines() do
	local action, data = line:match("^([^:]+)(.*)$");
	print(actions[action] and actions[action](data) or "0");
end