[Can i put a /ban @p command into a command block?]

Working on a project and this is a big part of it. But for some reason it doesnt do anything when i power it. Is this not possible?

[Greetings!]

hello could use some help.. i asked a staff to ban me from the server as a joke for one minute.. thing is that was two hours ago and i am still banned.. can i get an unban please?