Scoreboard

Hello i need help!

i want to create scoreboard and then get score in plugin.

Minecraft:
/scoreboard objectives add test dummy "Test"
/scoreboard player add player 1

Plugin CodeTHIS IS JUST HOW I THINK THATS NOT CORRECT(maybe)
scorename = player.getscore("Test");
players = scorename.getscore("player");
player.sendmessage(players + " : This is how much players";