Handles OAuth configuration for PhoenixKit installation.

PhoenixKit uses fully dynamic OAuth - providers are configured at runtime from database. However, a minimal compile-time configuration is still required for Ueberauth to initialize.

How It Works

Instead of using plug Ueberauth (which requires compile-time providers configuration), PhoenixKit calls Ueberauth functions directly in the OAuth controller:

# In PhoenixKitWeb.Users.OAuth controller:
# - request/2 calls Ueberauth.run_request/4
# - callback/2 calls Ueberauth.run_callback/4

This approach allows:

• Minimal compile-time configuration - Only config :ueberauth, Ueberauth, providers: %{}
• Database-driven credentials - Credentials loaded from Settings table at runtime
• Dynamic provider management - Add/remove/modify providers without app restart

Runtime OAuth Flow

1. User clicks "Sign in with Google"
2. PhoenixKitWeb.Plugs.EnsureOAuthConfig loads credentials from database
3. PhoenixKitWeb.Users.OAuth.request/2 calls Ueberauth.run_request/4 dynamically
4. User authenticates with provider
5. PhoenixKitWeb.Users.OAuth.callback/2 calls Ueberauth.run_callback/4 dynamically
6. User is logged in

Related Modules

• PhoenixKit.Users.OAuthConfig - Configures credentials in Application env at runtime
• PhoenixKit.Workers.OAuthConfigLoader - Loads OAuth config on app startup
• PhoenixKitWeb.Plugs.EnsureOAuthConfig - Ensures credentials loaded before OAuth
• PhoenixKitWeb.Users.OAuth - OAuth controller with dynamic Ueberauth calls