Finish adding sqlc and fix some bugs

internal/handlers/handlers.go

@@ -32,7 +32,7 @@ type Repository struct {
 func NewRepo(a *config.AppConfig, db *repository.DB) *Repository {
 	return &Repository{
 		App: a,
-		DB:  dbrepo.NewPostgresRepo(db.SQL, a),
+		DB:  dbrepo.NewPgcRepo(db.PG, a),
 	}
 }