求指点 Refused to set unsafe header "cookie"

物联网项目，先写好了 API，使用 JWT AUTH，token 写入 cookie，提示 Refused to set unsafe header "cookie"。
服务器已经设置了
header / Access-Control-Allow-Origin *
header / Access-Control-Allow-Credentials true
代码如下:

	$.ajax({
		url: "https://api.xxx.xxx/temperature/",
		type: "GET",  
		beforeSend: function(xhr){  
			xhr.setRequestHeader('cookie', token)  
		},  
		success: function(data){  
			alert(data);  
		}  
	})  

求解惑