Do not panic if there is no Redsys payment set up yet

pkg/booking/admin.go

@@ -35,8 +35,10 @@ func (h *AdminHandler) Handler(user *auth.User, company *auth.Company, conn *dat
 			case http.MethodGet:
 				f := newPaymentForm(user.Locale)
 				if err := f.FillFromDatabase(r.Context(), company, conn); err != nil {
+					if !database.ErrorIsNotFound(err) {
 						panic(err)
 					}
+				}
 				f.MustRender(w, r, user, company)
 			case http.MethodPut:
 				updatePaymentSettings(w, r, user, company, conn)