auth cookie is valid as long as session

rest-api/src/main/java/lcsb/mapviewer/api/users/UserController.java

@@ -51,7 +51,7 @@ public class UserController extends BaseController {
 		} else {
 			Map<String, Object> result = new HashMap<>();
 			final Boolean useSecureCookie = false;
-			final int expiryTime = (int) (token.getExpires().getTimeInMillis() - Calendar.getInstance().getTimeInMillis() - 60000) / 1000;
+			final int expiryTime = (int) (token.getExpires().getTimeInMillis() - Calendar.getInstance().getTimeInMillis()) / 1000;
 			final String cookiePath = "/";
 
 			Cookie cookie = new Cookie("MINERVA_AUTH_TOKEN", token.getId());