Added authorization

internal/infrastructure/auth.go

@@ -0,0 +1,19 @@
+package infrastructure
+
+import (
+	"net/http"
+
+	"github.com/gin-contrib/sessions"
+	"github.com/gin-gonic/gin"
+)
+
+func AuthRequired(c *gin.Context) {
+	session := sessions.Default(c)
+
+	if user := session.Get("user"); user == nil {
+		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
+
+	c.Next()
+}