Use string instead of ID type

postgres/users.sql

@@ -1,5 +1,5 @@
 CREATE TABLE users (
-    id uuid, 
+    id char(26),
     email text,
     name text,
     password text

postgres/userservice.go

@@ -12,7 +12,7 @@ type UserService struct {
 }
 
 // User returns a user for a given id.
-func (s *UserService) User(id budgeteer.ID) (*budgeteer.User, error) {
+func (s *UserService) User(id string) (*budgeteer.User, error) {
 	u := &budgeteer.User{ID: id}
 	err := s.DB.Select(&u)
 	if err != nil {