How to give array in form data???

Hi,

Can any body please help me how to send array in formparam???I am giving my situation…

.post(“user/posts”)
.formParam(“users”,"[user_1@abc.com,user_2@abc.com,user_3@abc.com]")

May be syntax is incorrect…But I want to send like that…What to do???please help me…

Thnaks…

Please help me…