Prosody: use the user nickname.

server/lib/routers/api.ts

@@ -2,7 +2,7 @@ import type { Router, Request, Response, NextFunction } from 'express'
 import { videoHasWebchat } from '../../../shared/lib/video'
 import { asyncMiddleware } from '../middlewares/async'
 import { prosodyCheckUserPassword, prosodyRegisterUser, prosodyUserRegistered } from '../prosody/auth'
-import { getAuthUser } from '../helpers'
+import { getAuthUser, getUserNickname } from '../helpers'
 
 // See here for description: https://modules.prosody.im/mod_muc_http_defaults.html
 interface RoomDefaults {
@@ -92,10 +92,17 @@ async function initApiRouter (options: RegisterServerOptions): Promise<Router> {
         res.sendStatus(403)
         return
       }
+      let userId: number | undefined
+      if (user.id) {
+        userId = parseInt(user.id)
+        if (Number.isNaN(userId)) { userId = undefined }
+      }
       const password: string = await prosodyRegisterUser(user.username)
+      const nickname: string | undefined = userId ? (await getUserNickname(options, userId)) : undefined
       res.status(200).json({
         jid: user.username + '@localhost',
-        password: password
+        password: password,
+        nickname: nickname
       })
     }
   ))