Fix missing function, fix signup calls

Author: dmitrizagidulin

lib/handlers/oidc.js

@@ -8,6 +8,7 @@ var debug = require('../debug')
 var util = require('../utils')
 // const bodyParser = require('body-parser')
 var path = require('path')
+const addLink = require('../header').addLink
 
 module.exports.api = api
 module.exports.authenticate = authenticate

lib/identity-provider.js

@@ -520,14 +520,14 @@ IdentityProvider.prototype.post = function (req, res, next) {
         return callback()
       }
 
-      const oidc = req.app.locals.oidc
+      const oidcRpClient = req.app.locals.oidc
 
-      if (!oidc) {
+      if (!oidcRpClient) {
         debug('there is no OidcService')
         return callback()
       }
-
-      return oidc.client.users
+      let trustedClient = oidcRpClient.trustedClient
+      return trustedClient.client.users
         .create({
           email: options.email,
           profile: agent,