Throw error on failed authorization

- to exit signal-cli in case the number was registered elsewhere

src/main/java/org/asamk/signal/manager/Manager.java

@@ -137,6 +137,7 @@ public class Manager implements Signal {
             }
         } catch (AuthorizationFailedException e) {
             System.err.println("Authorization failed, was the number registered elsewhere?");
+            throw e;
         }
     }