Add minor fixes in application registration flow

components/apimgt-extensions/io.entgra.device.mgt.core.apimgt.application.extension/src/main/java/io/entgra/device/mgt/core/apimgt/application/extension/APIManagementProviderServiceImpl.java

@@ -112,12 +112,14 @@ public class APIManagementProviderServiceImpl implements APIManagementProviderSe
             }
 
             Map<String, APIInfo> uniqueApiSet = new HashMap<>();
-            for (String tag : tags) {
-                Map<String, String> queryParams = new HashMap<>();
-                queryParams.put("tag", tag);
+            if (tags != null) {
+                for (String tag : tags) {
+                    Map<String, String> queryParams = new HashMap<>();
+                    queryParams.put("tag", tag);
 
-                APIInfo[] apiInfos = consumerRESTAPIServices.getAllApis(apiApplicationInfo, queryParams, headerParams);
-                Arrays.stream(apiInfos).forEach(apiInfo -> uniqueApiSet.putIfAbsent(apiInfo.getName(), apiInfo));
+                    APIInfo[] apiInfos = consumerRESTAPIServices.getAllApis(apiApplicationInfo, queryParams, headerParams);
+                    Arrays.stream(apiInfos).forEach(apiInfo -> uniqueApiSet.putIfAbsent(apiInfo.getName(), apiInfo));
+                }
             }
 
             List<APIInfo> uniqueApiList = new ArrayList<>(uniqueApiSet.values());

components/apimgt-extensions/io.entgra.device.mgt.core.apimgt.keymgt.extension/src/main/java/io/entgra/device/mgt/core/apimgt/keymgt/extension/service/KeyMgtServiceImpl.java

@@ -135,7 +135,8 @@ public class KeyMgtServiceImpl implements KeyMgtService {
             //todo --> can use requestingUserAccessToken token here to get application data - modify getApplication
             // method signature
 
-            io.entgra.device.mgt.core.apimgt.extension.rest.api.bean.APIMConsumer.Application application = getApplication(clientName, owner);
+            io.entgra.device.mgt.core.apimgt.extension.rest.api.bean.APIMConsumer.Application application =
+                    getApplication(clientName, requestingUserAccessToken);
             String applicationUUID = application.getApplicationId();
 
             // do app key mapping