new licenceController, moved api handling & renaming things

internal/controllers/membershipController.go

@@ -46,3 +46,19 @@ func (mc *MembershipController) RegisterSubscription(c *gin.Context) {
 		"id":     id,
 	})
 }
+
+func (mc *MembershipController) GetSubscriptions(c *gin.Context) {
+	subscriptions, err := mc.Service.GetSubscriptions(nil)
+	if err != nil {
+		logger.Error.Printf("Error retrieving subscriptions: %v", err)
+		c.JSON(http.StatusInternalServerError, gin.H{"errors": []gin.H{{
+			"field": "general",
+			"key":   "validation.internal_server_error",
+		}}})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"subscriptions": subscriptions,
+	})
+}