Use when the user asks to "set up authentication", "add login", "add logout", "add sign in", "enable auth", "add role-based access", "add authorization", "protect routes", "configure identity provider", "configure Entra ID", "configure Entra External ID", "configure OpenID Connect", "add OIDC", "set up SAML", "set up WS-Federation", "set up local login", "add Facebook login", "add Google sign in", "add Microsoft Account", or otherwise wants to set up authentication (login/logout) and role-based authorization for their Power Pages code site using any supported identity provider. Also sets up the IdP app registration for OIDC providers (Okta, Auth0, Entra External ID, and other OIDC) -- reads the provider's docs first, then either guides the user through the provider's console or, when the provider supports it, configures it for the user -- and wires the client ID, authority, and claims mapping into Power Pages.