Man pages matching name memcached_destroy_sasl_auth_data in section 3:

memcached_destroy_sasl_auth_data.3.en	debian 10 / libmemcached-dev
memcached_destroy_sasl_auth_data.3.en	debian 11 / libmemcached-dev
memcached_destroy_sasl_auth_data.3.en	debian 12 / libmemcached-dev