Handle loginUserWithUserAttributes with only userId

Author: albinekb

android/src/main/java/com/intercom/reactnative/IntercomModule.java

@@ -136,12 +136,14 @@ public void loginUserWithUserAttributes(ReadableMap params, Promise promise) {
     Boolean hasEmail = params.hasKey("email") && IntercomHelpers.getValueAsStringForKey(params, "email").length() > 0;
     Boolean hasUserId = params.hasKey("userId") && IntercomHelpers.getValueAsStringForKey(params, "userId").length() > 0;
     Registration registration = null;
-    String email = IntercomHelpers.getValueAsStringForKey(params, "email");
     String userId = IntercomHelpers.getValueAsStringForKey(params, "userId");
-    if (hasEmail && hasUserId) {
-      registration = new Registration().withEmail(email).withUserId(userId);
-    } else if (hasEmail) {
-      registration = Registration.create().withEmail(email);
+    if (hasEmail) {
+      String email = IntercomHelpers.getValueAsStringForKey(params, "email");
+      if (hasUserId) {
+        registration = new Registration().withEmail(email).withUserId(userId);
+      } else {
+        registration = Registration.create().withEmail(email);
+      }
     } else if (hasUserId) {
       registration = Registration.create().withUserId(userId);
     } else {