/*
 * Copyright 2004-present the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Core classes and interfaces related to user authentication, which are used throughout
 * Spring Security.
 * <p>
 * Of key importance is the
 * {@link org.springframework.security.authentication.AuthenticationManager
 * AuthenticationManager} and its default implementation
 * {@link org.springframework.security.authentication.ProviderManager ProviderManager},
 * which maintains a list
 * {@link org.springframework.security.authentication.AuthenticationProvider
 * AuthenticationProvider}s to which it delegates authentication requests.
 */
@NullMarked
package org.springframework.security.authentication;

import org.jspecify.annotations.NullMarked;
