How to properly load css and setup auth in an umbrella application using phoenix v1.7.0-rc.0?

Questions & Help Questions
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I’m running into a number of issues when attempting to use the latest version of phoenix in an umbrella application. My process is as follows:

  1. mix new auth_umbrella --umbrella
  2. cd auth_umbrella/apps
  3. mix phx.new.web auth --no-ecto (Y to install deps)
  4. cd auth
  5. Add {Phoenix.PubSub, name: Auth.PubSub} to supervision tree

Here is where my first issue arrises. When I start the server using mix phx.server everything compiles and starts with no errors but when I visit localhost:4000 I’m greeted with an unstyled page. Checking the sources in dev tools shows that app.css is present. When I generate a standalone phoenix app the landing page is styled as expected.

The next error occurs when attempting to add authentication:
6. cd ../ to return to apps directory
7. mix new auth_context --sup
8. cd auth (the phoenix app)
9. mix phx.gen.auth Accounts User users

Step 9 yields the error:

** (Mix) no context_app configured for current application auth.

Add the context_app generators config in config.exs, or pass the
--context-app option explicitly to the generators. For example:

via config:

  config :auth, :generators,
   context_app: :some_app

via cli option:

  mix phx.gen.[task] --context-app some_app

Note: cli option only works when `context_app` is not set to `false`
in the config.

So in auth_umbrella/config/config.exs I set the context app to auth_context:

config :auth,
  generators: [context_app: :auth_context]

and when I repeat step 9 I get the same error. I try to use the cli option with both mix phx.gen.auth Accounts User users --context-app :auth_context and mix phx.gen.auth Accounts User users --context-app auth_context . I get the following new error message:

** (Mix) Could not invoke task "phx.gen.auth": 1 error found!
--context-app : Unknown option