Some breeds are more flighty than others. If you want them friendly, put a chair in there and sit with a book or your phone, until they start to ignore you. Drop a little scratch and leave.
Day two - repeat, but once they start ignoring you toss the grain away from you. They are going to act like it was a bomb, but just sit quietly until they find it and eat it up. Then leave quietly.
Day three, once again, when they have relaxed, throw the grain a little closer to you. The reaction to the throw should be slightly less, and the recovery to find the treat quicker.
Day four. Sit down and wait a bit, then put feed within a foot of your own feet. Don't throw it this time, just pour it out.
Don't reach for them, don't try and catch them. Often times people will say, once I am holding them, they just snuggle in, but I don't think that is true. When prey is caught, a lot of time they pretend to be dead, sometimes that will throw the predator off, that gets excited by the conflict.
IMO - chickens really don't love people, but they do catch on to this person brings treats.
Mrs K