Solar tribute

/silent-command
--[[ 
  Calculates who has places the most solar pannels on the map.
]]
local cred={}
for k,v in pairs(game.player.surface.find_entities_filtered(
    {type={'solar-panel','accumulator'}})) do

    local usr = v.last_user.name

    if cred[usr] then
        cred[usr] = cred[usr] + 1
    else
        cred[usr] = 1
    end
end

for k,v in pairs(cred) do game.print(k .. ' ' .. v) end