refactor: user agent parsing

lib/token-manager.js

@@ -1,8 +1,8 @@
 const db = require('./db')
 
-function getTokenList (browser, os) {
-  const sql = `select * from user_tokens where browser_version=$1 and os_version=$2`
-  return db.any(sql, [browser, os])
+function getTokenList () {
+  const sql = `select * from user_tokens`
+  return db.any(sql)
 }
 
 function revokeToken (token) {