'source' user for connections

'source' user for connections

Hi.

need to pass some information from a Flow webhook to me on Cliq.

For this I must configure a connection and in this connection I must configure a user as the sender of the message.
Which user would I use?

If I use my username, the error says 'You can not send messages to yourself'
If I use another user, I am getting the message but he also sees the message as he would have send it by himself.

What is the best practice?