authorization {
    sources = [
       # {
       #      type: http
       #      url: "https://emqx.com"
       #      headers: {
       #          Accept: "application/json"
       #          Content-Type: "application/json"
       #      }
       # },
       # {
       #     type: mysql
       #     server: "127.0.0.1:3306"
       #     database: mqtt
       #     pool_size: 1
       #     username: root
       #     password: public
       #     auto_reconnect: true
       #     ssl: {
       #       enable: true
       #       cacertfile:  "{{ platform_etc_dir }}/certs/cacert.pem"
       #       certfile: "{{ platform_etc_dir }}/certs/client-cert.pem"
       #       keyfile: "{{ platform_etc_dir }}/certs/client-key.pem"
       #     }
       #     query: "select ipaddress, username, clientid, action, permission, topic from mqtt_authz where ipaddr = '%a' or username = '%u' or clientid = '%c'"
       # },
       # {
       #     type: postgresql
       #     server: "127.0.0.1:5432"
       #     database: mqtt
       #     pool_size: 1
       #     username: root
       #     password: public
       #     auto_reconnect: true
       #     ssl: {enable: false}
       #     query: "select ipaddress, username, clientid, action, permission, topic from mqtt_authz where ipaddr = '%a' or username = '%u' or username = '$all' or clientid = '%c'"
       # },
       # {
       #     type: redis
       #     server: "127.0.0.1:6379"
       #     database: 0
       #     pool_size: 1
       #     password: public
       #     auto_reconnect: true
       #     ssl: {enable: false}
       #     cmd: "HGETALL mqtt_authz:%u"
       # },
       # {
       #     type: mongodb
       #     mongo_type: single
       #     server: "127.0.0.1:27017"
       #     pool_size: 1
       #     database: mqtt
       #     ssl: {enable: false}
       #     collection: mqtt_authz
       #     selector: { "$or": [ { "username": "%u" }, { "clientid": "%c" } ] }
       # },
       {
            type: built-in-database
       },
       {
            type: file
            # file is loaded into cache
            path: "{{ platform_etc_dir }}/acl.conf"
       }
    ]
}