refactor sqlite db to support sqlc

internal/models/models.go

@@ -1,6 +1,7 @@
 package models
 
 import (
+	"fmt"
 	"github.com/google/uuid"
 	"net/mail"
 	"strings"
@@ -99,10 +100,17 @@ func CustomerIdToString(customerId CustomerId) string {
 type SessionId uuid.UUID
 type UserId uuid.UUID
 
+func UserIdFromString(userId string) UserId {
+	id, err := uuid.Parse(userId)
+	if err != nil {
+		fmt.Errorf("unable to parse user id %+v", err)
+	}
+	return UserId(id)
+}
+
 func (s *SessionId) String() string {
 	id := uuid.UUID(*s)
 	return id.String()
-
 }
 
 type UserEmail string