add output for storing token and username

src/user.ts

@@ -59,11 +59,13 @@ export default class User {
   public setUsernameToLocal(username: string) {
     this.context.globalState.update(this.usernameKey, username);
     this.username = username;
+    console.log('Username has been stored.')
   }
 
   public setUserTokenToLocal(userToken: string) {
     this.context.globalState.update(this.userTokenKey, userToken)
     this.userToken = userToken
+    console.log('Token has been stored.');
   }
 
   public getUserPrivateKeyPath(): string {
@@ -134,6 +136,7 @@ export default class User {
       await fs.writeFileSync(this.getUserPrivateKeyPath(), privateKeyStr);
       // limit the permission of private key to prevent that the private key not works
       await fs.chmodSync(this.getUserPrivateKeyPath(), 0o600)
+      console.log(`User's ssh key has been created.`)
     } catch (error) {
       console.error("Failed to write public/private key into the default ssh public/key file: ", error);
     }