java - Instagram Search query to find an user by firstName and lastName -

i using instgarm java api find user using first , last name. in api have use first name , last name of user find

public userfeed searchuser(string query, int count) throws instagramexception {         preconditions.checknotnull(query, "search query cannot null.");          map<string, string> params = new hashmap<string, string>();         params.put(queryparam.search_query, query);          if(count > 0) {             params.put(queryparam.count, string.valueof(count));         }          userfeed userfeed = createinstagramobject(verbs.get, userfeed.class, methods.users_search, params);          return userfeed;     } 

in api have above method. how construct query find user based on first , last name. when pass name means returns lot of users want exact search using first , last name. 1 can me?