class MyEndpoint extends Endpoint {
  // Require the user to be signed in to access methods in this endpoint.
  @override
  bool get requireLogin => true;

  // Require the user to have the admin scope.
  @override
  Set<Scope> get requiredScopes => {Scope.admin};

  // This method can only be accessed if the user is admin.
  Future<void> myMethod(Session session) async {
    ...
  }
  ...
}

import 'package:serverpod_auth_idp_server/core.dart';

// Get authenticated user's ID.
final userIdUuidValue = session.authenticated?.authUserId;

// Get the user profile (full name, email, etc)
var userProfile = await session.authenticated?.userProfile(session);

// Find a user profile by email.
final profiles = await AuthServices.instance.userProfiles.admin
    .listUserProfiles(
      session,
      email: email.toLowerCase(),
      limit: 1,
    );
final userProfile = profiles.firstOrNull;

// Get authentication info for user id (for editing scopes, etc).
final authUsers = AuthServices.instance.authUsers;
final authUser = await authUsers.get(
  session,
  authUserId: userProfile.authUserId,
);

SignInWidget(
  client: client,
  onAuthenticated: () => _showSnackBar(message: 'User authenticated.'),
  onError: (error) => _showSnackBar(message: 'Authentication failed: $error'),
)