Use DEVICE_ENROLLMENT email type to create OTP

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/util/DeviceMgtAPIUtils.java

@@ -364,16 +364,12 @@ public class DeviceMgtAPIUtils {
      */
     public static synchronized OTPManagementService getOTPManagementService() {
         if (otpManagementService == null) {
-            synchronized (DeviceMgtAPIUtils.class) {
-                if (otpManagementService == null) {
-                    PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
-                    otpManagementService = (OTPManagementService) ctx.getOSGiService(OTPManagementService.class, null);
-                    if (otpManagementService == null) {
-                        String msg = "OTP Management service has not initialized.";
-                        log.error(msg);
-                        throw new IllegalStateException(msg);
-                    }
-                }
+            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
+            otpManagementService = (OTPManagementService) ctx.getOSGiService(OTPManagementService.class, null);
+            if (otpManagementService == null) {
+                String msg = "OTP Management service has not initialized.";
+                log.error(msg);
+                throw new IllegalStateException(msg);
             }
         }
         return otpManagementService;

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/otp/mgt/OTPEmailTypes.java

@@ -18,5 +18,5 @@
 package org.wso2.carbon.device.mgt.common.otp.mgt;
 
 public enum OTPEmailTypes {
-    USER_VERIFY, ENROLLMENT
+    USER_VERIFY, DEVICE_ENROLLMENT
 }

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/otp/mgt/service/OTPManagementServiceImpl.java

@@ -33,6 +33,7 @@ import org.wso2.carbon.device.mgt.common.invitation.mgt.DeviceEnrollmentInvitati
 import org.wso2.carbon.device.mgt.common.invitation.mgt.DeviceEnrollmentInvitationDetails;
 import org.wso2.carbon.device.mgt.common.invitation.mgt.DeviceEnrollmentType;
 import org.wso2.carbon.device.mgt.common.metadata.mgt.Metadata;
+import org.wso2.carbon.device.mgt.common.otp.mgt.OTPEmailTypes;
 import org.wso2.carbon.device.mgt.common.otp.mgt.dto.OneTimePinDTO;
 import org.wso2.carbon.device.mgt.common.spi.OTPManagementService;
 import org.wso2.carbon.device.mgt.core.DeviceManagementConstants;
@@ -204,7 +205,8 @@ public class OTPManagementServiceImpl implements OTPManagementService {
             for (String username : deviceEnrollmentInvitation.getUsernames()) {
                 String emailAddress = DeviceManagerUtil.getUserClaimValue(
                         username, DeviceManagementConstants.User.CLAIM_EMAIL_ADDRESS);
-                oneTimePinDTO = createOneTimePin(emailAddress, "test-type", username, null, tenantId);
+                oneTimePinDTO = createOneTimePin(emailAddress, OTPEmailTypes.DEVICE_ENROLLMENT.toString(), username,
+                        null, tenantId);
                 props.setProperty("first-name", DeviceManagerUtil.
                         getUserClaimValue(username, DeviceManagementConstants.User.CLAIM_FIRST_NAME));
                 props.setProperty("username", username);