Fix Identity Casting Issue

Author: BrandonStalnaker

.DS_Store

@@ -533,7 +533,7 @@ + (MPIdentityApiRequest *)MPIdentityApiRequest:(id)json {
             request.customerId = json[@"customerId"];
         } else {
             NSString *value = json[key];
-            MPUserIdentity identityType = (MPUserIdentity)key.intValue;
+            MPIdentity identityType = (MPIdentity)key.intValue;
             [request setIdentity:value identityType:identityType];
         }
     }