Cannot generate tokens for authentication between extension and backend - yikes!

[den232]

Hi.

I am confused!  I am trying to generate and use access/session tokens for authorization of communications between my theme extension and backend, but coming up short in a few ways.  Pls ... what am I doing wrong or ??

Problem #1.

Running on my development server, I installed via npm the @Shopify/admin-ui-extensions.   But when I attempt to import it into my extension js code, I keep getting failed references to the shopify CDN at https://cdn.shopify.com/extensions/node_modules/@shopify/admin-ui-extensions ...

I have tried all sorts of locations in the install line, none seem to work

 import ... from '@shopify/admin-ui-extensions'  =>  Relative references must start with either "/", "./", or "../".

import {extend, TextField, Button} from '../../../@shopify/admin-ui-extensions'; 

import {extend, TextField, Button} from '../../../node_modules/@shopify/admin-ui-extensions';

import {extend, TextField, Button} from '/@shopify/admin-ui-extensions' 

import { extend, TextField, Button } from '/node_modules/@shopify/admin-ui-extensions';

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Problem 2.

The documentation seems to be telling me that I cannot use this in production anyway.  What should I use instead to get/use tokens?

(from https://shopify.dev/docs/api/admin-extensions#custom-protocols-extension-protocol😞

Admin UI block extensions are currently in developer preview. You can only render them while developing locally on a development store.

Thanks and best regards, jb