apply_filters( 'sanitize_user', string $username, string $raw_username, bool $strict )

2150	 * @since 2.0.12151	 *2152	 * @param string $username     Sanitized username.2153	 * @param string $raw_username The username prior to sanitization.2154	 * @param bool   $strict       Whether to limit the sanitization to specific characters.2155	 */2156	return apply_filters( 'sanitize_user', $username, $raw_username, $strict );2157}2158 2159/**2160 * Sanitizes a string key.2161 *2162 * Keys are used as internal identifiers. Lowercase alphanumeric characters,