readme and slight adjustments

README.MD

@@ -100,4 +100,19 @@ Add the following line to the end of the file:
 
 > 0 12 * * * /path/to/your/script.sh
 
-Save and exit the file.
+Save and exit the file.
+
+## MySQL user 🛢️
+
+If You want to dump all of MySQL databases, read only user is recommended for that action.
+
+It can be created with the following MySQL command:
+
+> GRANT LOCK TABLES, SELECT ON DATABASE_NAME.* TO 'BACKUP_USER'@'%' IDENTIFIED BY 'PASSWORD';
+
+## Buy me a beer 🍻
+
+One pale ale won't hurt, will it ?
+
+0x4046979a1E1152ddbfa4a910b1a98F73625a77ae
+ETH / BNB and Polygon chains