added check for the user in auth plugin

Author: DavertMik

lib/plugin/auth.js

@@ -8,7 +8,7 @@ const store = require('../store')
 const event = require('../event')
 const recorder = require('../recorder')
 const { debug } = require('../output')
-const isAsyncFunction = require('../utils').isAsyncFunction
+const { isAsyncFunction } = require('../utils')
 
 const defaultUser = {
   fetch: I => I.grabCookie(),
@@ -270,6 +270,12 @@ module.exports = function (config) {
 
   const loginFunction = async name => {
     const I = container.support('I')
+    const userSession = config.users[name]
+
+    if (!userSession) {
+      throw new Error(`User '${name}' was not configured for authorization in auth plugin. Add it to the plugin config`)
+    }
+
     const test = store.currentTest
 
     // we are in BeforeSuite hook
@@ -298,7 +304,6 @@ module.exports = function (config) {
 
     section.start()
 
-    const userSession = config.users[name]
     const cookies = store[`${name}_session`]
     const shouldAwait = isAsyncFunction(userSession.login) || isAsyncFunction(userSession.restore) || isAsyncFunction(userSession.check)