Added --singleuser flag to server

replaces the old --serverwide-arl flag of deemix-pyweb
it's always off on the gui

server/src/helpers/loginStorage.ts

@@ -0,0 +1,45 @@
+import fs from 'fs'
+// @ts-expect-error
+import deemix from 'deemix'
+import { LoginFile } from '../types'
+
+const configFolder = deemix.utils.localpaths.getConfigFolder()
+
+const DEFAULTS: LoginFile = {
+	accessToken: null,
+	arl: null
+}
+
+let loginData: LoginFile = {
+	accessToken: null,
+	arl: null
+}
+
+export function loadLoginCredentials() {
+	if (!fs.existsSync(configFolder)) fs.mkdirSync(configFolder)
+	if (!fs.existsSync(configFolder + 'login.json')) resetLoginCredentials()
+
+	try {
+		loginData = JSON.parse(fs.readFileSync(configFolder + 'login.json').toString())
+	} catch (e) {
+		if (e.name === 'SyntaxError') resetLoginCredentials()
+	}
+}
+
+export function getLoginCredentials(): LoginFile {
+	if (!loginData.arl) loadLoginCredentials()
+	return loginData
+}
+
+export function saveLoginCredentials(newLogin: LoginFile) {
+	if (newLogin.arl) loginData.arl = newLogin.arl
+	if (newLogin.accessToken) loginData.accessToken = newLogin.accessToken
+	if (!fs.existsSync(configFolder)) fs.mkdirSync(configFolder)
+	fs.writeFileSync(configFolder + 'login.json', JSON.stringify(loginData, null, 2))
+}
+
+export function resetLoginCredentials() {
+	if (!fs.existsSync(configFolder)) fs.mkdirSync(configFolder)
+	fs.writeFileSync(configFolder + 'login.json', JSON.stringify(DEFAULTS, null, 2))
+	loginData = JSON.parse(JSON.stringify(DEFAULTS))
+}