Fixing the download agent issue for virtual fire alarm

components/device-types/virtual-fire-alarm-plugin/org.wso2.carbon.device.mgt.iot.virtualfirealarm.api/src/main/java/org/wso2/carbon/device/mgt/iot/virtualfirealarm/service/impl/VirtualFireAlarmServiceImpl.java

@@ -233,15 +233,27 @@ public class VirtualFireAlarmServiceImpl implements VirtualFireAlarmService {
             throw new DeviceManagementException(msg);
         }
         if (apiApplicationKey == null) {
+            String adminUsername = PrivilegedCarbonContext.getThreadLocalCarbonContext().getUserRealm()
+                    .getRealmConfiguration().getAdminUserName();
+            String tenantAdminDomainName = PrivilegedCarbonContext.getThreadLocalCarbonContext()
+                    .getTenantDomain();
             String applicationUsername =
                     PrivilegedCarbonContext.getThreadLocalCarbonContext().getUserRealm().getRealmConfiguration()
                             .getAdminUserName() + "@" + PrivilegedCarbonContext.getThreadLocalCarbonContext()
                             .getTenantDomain();
             APIManagementProviderService apiManagementProviderService = APIUtil.getAPIManagementProviderService();
             String[] tags = {VirtualFireAlarmConstants.DEVICE_TYPE};
+            try {
+                PrivilegedCarbonContext.startTenantFlow();
+                PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantDomain(tenantAdminDomainName);
+                PrivilegedCarbonContext.getThreadLocalCarbonContext().setUsername(adminUsername);
+
                 apiApplicationKey = apiManagementProviderService.generateAndRetrieveApplicationKeys(
                         VirtualFireAlarmConstants.DEVICE_TYPE, tags, KEY_TYPE, applicationUsername, true,
                         VirtualFireAlarmConstants.APIM_APPLICATION_TOKEN_VALIDITY_PERIOD);
+            } finally {
+                PrivilegedCarbonContext.endTenantFlow();
+            }
         }
         JWTClient jwtClient = APIUtil.getJWTClientManagerService().getJWTClient();
         String scopes = " device_" + deviceId;