Checkin time data column, checkin module

Signed-off-by: Asai Neko <sugar@sne.moe>

service/checkin/checkin.go

@@ -3,6 +3,7 @@ package checkin
 import (
 	"net/http"
 	"nixcn-cms/data"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
@@ -17,7 +18,7 @@ func Checkin(ctx *gin.Context) {
 		})
 		return
 	}
-	data.SetCheckinState(userId.(uuid.UUID), true)
+	data.SetCheckinState(userId.(uuid.UUID), time.Now())
 	ctx.JSON(http.StatusOK, gin.H{
 		"status": "success",
 	})