added username for uniqueness of connection db entry

backend/src/test/java/com/vaessl/app/connection/HomeboxIntegrationTest.java

@@ -179,11 +179,12 @@ class HomeboxIntegrationTest {
 
         DocumentContext responseContext = JsonPath.parse(response.getBody());
 
-        ConnectionEntity dbEntry = cRepository.findByAppUrl(request.appUrl());
+        ConnectionEntity dbEntry = cRepository.findByAppUrlAndUsername(request.appUrl(), request.credentials().get("username"));
 
         assertThat(dbEntry).isNotNull();
 
         assertThat(dbEntry.getAppUrl()).isEqualTo(request.appUrl());
+        assertThat(dbEntry.getUsername()).isEqualTo(request.credentials().get("username"));
 
         if (dbEntry instanceof HomeboxEntity hbE) {
             assertThat(hbE.getToken()).isEqualTo(responseContext.read("$.token"));