basic.component.ts

 hideBtns = true;
 
 async startCall() {
      const uid = this.stream.generateUid();
      const rtcDetails = await this.stream.generateTokenAndUid(uid);
      this.stream.createRTCClient();
      this.stream.agoraServerEvents(this.stream.rtc);
      await this.stream.localUser(rtcDetails.token, uid);

      this.hideBtns = false;
  }

  async logout() {
    await this.stream.leaveCall();
  }