When we create a message hub instance in bluemix, we can see a service credentials tab on the screen. The data is in json format and not editable:
"user": "xxxxxxxxxxxxxxxx", "password": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
Is there any method to customize or edit the username and password?
no, there is no way for you to customise or edit the username and password.
You can delete the credentials you have, and use the "new credential" button to generate a new username and password, but these will also be randomly generated for you. (I would recommend you do delete the credentials you have shared here...)
