How to set App Keys asynchronously?

System Information
  • Strapi Version: 4.2.0-beta.2
  • Operating System: Mac OS Monterey
  • Node Version: v16.14.2
  • NPM Version: 8.5.4

Hello everybody,

Does anyone know how to set the APP_KEYS asynchronously?

My code is:

// index.ts

export default {
    async register({ strapi }) {
        const credentials = await getAwsSecrets();

        strapi.config.set("server", {
        host: credentials.HOST,
        port: credentials.PORT,
        app: {
          keys: credentials.APP_KEYS,

// server.ts

export default ({ env }) => ({
  host: env("HOST", ""),
  port:"PORT", 1337),
  app: {
    keys: env.array("APP_KEYS"), 

But this error is occurs:

debug: ⛔️ Server wasn't able to start properly.
error: Middleware "strapi::session": App keys are required. Please set app.keys in config/server.js (ex: keys: ['myKeyA', 'myKeyB'])
	at instantiateMiddleware (node_modules/@strapi/strapi/lib/services/server/middleware.js:12:11)
	at resolveMiddlewares (node_modules/@strapi/strapi/lib/services/server/middleware.js:56:18)
	at registerApplicationMiddlewares (node_modules/@strapi/strapi/lib/services/server/register-middlewares.js:66:29)
	at processTicksAndRejections (node:internal/process/task_queues:96:5)
	at async Object.initMiddlewares (node_modules/@strapi/strapi/lib/services/server/index.js:99:7)
	at async Strapi.bootstrap (node_modules/@strapi/strapi/lib/Strapi.js:436:5)
	at async Strapi.load (node_modules/@strapi/strapi/lib/Strapi.js:448:5)
	at async Strapi.start (node_modules/@strapi/strapi/lib/Strapi.js:196:9)