wp_authenticate( string $username, string $password ): WP_User|WP_Error

684	function wp_authenticate(685		$username,686		#[\SensitiveParameter]687		$password688	) {689		$username = sanitize_user( $username );690		$password = trim( $password );691 692		/**693		 * Filters whether a set of user login credentials are valid.694		 *695		 * A WP_User object is returned if the credentials authenticate a user.696		 * WP_Error or null otherwise.697		 *698		 * @since 2.8.0699		 * @since 4.5.0 `$username` now accepts an email address.700		 *701		 * @param null|WP_User|WP_Error $user     WP_User if the user is authenticated.702		 *                                        WP_Error or null otherwise.703		 * @param string                $username Username or email address.704		 * @param string                $password User password.705		 */706		$user = apply_filters( 'authenticate', null, $username, $password );707 708		if ( null === $user || false === $user ) {709			/*710			 * TODO: What should the error message be? (Or would these even happen?)711			 * Only needed if all authentication handlers fail to return anything.712			 */713			$user = new WP_Error( 'authentication_failed', __( '<strong>Error:</strong> Invalid username, email address or incorrect password.' ) );714		}715 716		$ignore_codes = array( 'empty_username', 'empty_password' );717 718		if ( is_wp_error( $user ) && ! in_array( $user->get_error_code(), $ignore_codes, true ) ) {719			$error = $user;720 721			/**722			 * Fires after a user login has failed.723			 *724			 * @since 2.5.0725			 * @since 4.5.0 The value of `$username` can now be an email address.726			 * @since 5.4.0 The `$error` parameter was added.727			 *728			 * @param string   $username Username or email address.729			 * @param WP_Error $error    A WP_Error object with the authentication failure details.730			 */731			do_action( 'wp_login_failed', $username, $error );732		}733 734		return $user;735	}