Use trust auth for local development db container

README.md

@@ -206,7 +206,7 @@ DEVELOPMENT_CREDENTIALS_KEY=...
 
 The credentials are now available anywhere you inject them:
 
-```
+```ruby
 module MyHanamiApp
   class ApiKeyPrinter
     include Deps[
@@ -220,6 +220,35 @@ module MyHanamiApp
 end
 ```
 
+You can use the credentials in other providers. Say, you want to pass the [ROM](https://rom-rb.org/) database URL (which contains the connection password) using credentials instead of settings. Simply replace `target["settings"].database_url` with `target["credentials"].database_url` and you're good to go:
+
+```ruby
+Hanami.app.register_provider :persistence, namespace: true do
+  prepare do
+    require "rom"
+
+    config = ROM::Configuration.new(:sql, target["credentials"].database_url)
+
+    register "config", config
+    register "db", config.gateways[:default].connection
+  end
+
+  (...)
+end
+```
+
+Finally, if you have trouble using the credentials in slices, you might have to [share this app component](https://www.rubydoc.info/gems/hanami/Hanami/Config#shared_app_component_keys-instance_method) in `config/app.rb`:
+
+```ruby
+module MyHanamiApp
+  class App < Hanami::App
+    config.shared_app_component_keys += ["credentials"]
+  end
+end
+```
+
+### Rails
+
 ### Rodbot
 
 Dry::Credentials is integrated into [Rodbot](https://github.com/svoop/rodbot) out of the box, see [the README for more](https://github.com/svoop/rodbot/blob/main/README.md#credentials).