when the user logs in with eggjs, and after the user has successfully logged in, put user in session

async login() {
    const ctx = this.ctx;
    const { username, password } = ctx.request.body;
    const user = await this.service.home.login(username, password);
    ctx.session.user = user;
    const { id, schemastr } = user || {};
    console.log(ctx.session);
    ctx.body = {
      data: {
        id,
        schemastr,
        username,
      },
      message: "success",
    };
 }
 

the problem is that after setting session, the session of other controller functions is empty:

async asyncData() {
    const ctx = this.ctx;
    const { id, schemastr } = ctx.request.body;
    this.service.home.asyncData(id, schemastr);
    console.log(ctx.session); // => {}
    ctx.body = {
      data: 200,
      message: "success",
    };
 }