FHEM - How to enable and set up MQTT2_CLIENT

gistfile1.txt

# How to enable MQTT2_CLIENT:
#
define MyMQTT MQTT2_CLIENT <IP of MQTT server>:1883

# How to set MQTT user name:
#
Go to FHEM => MyMQTT => attr MyMQTT
Select 'username' from drop-down menu (under 'MQTT2_CLIENT' heading)
Enter username in empty field and hit [Return] key

# How to set MQTT user password:
#
Go to FHEM => MyMQTT => set MyMQTT
Select 'password' from drop-down menu 
Enter password in empty field and hit [Return] key

# How to publish relevant MQTT topics:
#
Go to FHEM => MyMQTT => attr MyMQTT
Select 'rawEvents' from drop-down menu (under 'MQTT2_CLIENT' heading)
Enter 'fhem/set/.*' (without quotation marks) in empty field and hit [Return] key

# How to restrict subscription to a certain MQTT topic branch:
#
Go to FHEM => MyMQTT => attr MyMQTT
Select 'subscriptions' from drop-down menu (under 'MQTT2_CLIENT' heading)
Enter 'fhem/set/#' (without quotation marks) in empty field and hit [Return] key
Note that the syntax is here (fhem/set/#) different than above (fhem/set/.*).