Add userbudget

budget.go

@@ -11,7 +11,14 @@ type Budget struct {
 	LastModification time.Time
 }
 
+// UserBudget represents the relation between users and budgets
+type UserBudget struct {
+	UserID   string `sql:",pk"`
+	BudgetID string `sql:",pk"`
+}
+
 // BudgetService provides Methods for CRUD of Budgets
 type BudgetService interface {
 	Budget(id string) (Budget, error)
+	BudgetsForUser(user User) ([]Budget, error)
 }