MariaDB [(none)]> CREATE DATABASE auth;
Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> USE auth;
Database changed
MariaDB [auth]> CREATE TABLE users (
    -> user_name VARCHAR(50) NOT NULL,
    -> user_passwd VARCHAR(50) NOT NULL,
    -> PRIMARY KEY (user_name)
    -> );
Query OK, 0 rows affected (0.42 sec)

MariaDB [auth]> GRANT SELECT
    -> ON auth.users
    -> TO apache@localhost
    -> IDENTIFIED BY 'PaSsW0Rd';
Query OK, 0 rows affected (0.32 sec)

MariaDB [auth]> exit
Bye
[root@centos7 ~]# mysql -u root -p -e "INSERT INTO users (user_name, user_passwd) VALUES (\"apache\",\"$(htpasswd -nb apache password |cut -d ':' -f 2)\")" auth
Enter password: fenestros
[root@centos7 ~]# mysql -u root -p -e "SELECT * FROM auth.users;"
Enter password: fenestros
+-----------+---------------------------------------+
| user_name | user_passwd                           |
+-----------+---------------------------------------+
| apache    | $apr1$isUDg5bK$8oh0oMFUDfL41h84M9vYu1 |
+-----------+---------------------------------------+
[root@centos7 ~]#