java - get parse object from userList android -

i little bit confused resolve error. want search email id parse , check either email id exists there or not, if exists there give toast message user otherwise create account , it's data save on parse. but, getting error data not searching parse , not showing desire result.

parsequery<parseobject> query = parsequery.getquery("appuser");                             query.whereequalto("email", emailstr);                             query.findinbackground(new findcallback<parseobject>() {                                 @override                                 public void done(list<parseobject> userlist, com.parse.parseexception e) {                                     if (e == null) {                                         if (userlist.size() == 0) {                                              saveuseronparse(user);                                         }else{                                              toast temp = toast.maketext(sign_up.this, "this email exist here, must enter email sign up.", toast.length_short);                                             temp.show();                                         }                                   } else {                                     }                                 }                                }); 

i want search email if current email not existing in userlist save user on parse. please me, how can it.

thank you, have done solve problem using code.

parsequery<parseobject> query = parsequery.getquery("filename");                             query.whereequalto("email", user.getemail());                             query.countinbackground(new countcallback() {                                 @override                                 public void done(int count, com.parse.parseexception e) {                                     if (e == null){                                         if (count == 0){                                             saveuseronparse(user);                                         }                                         else{                                             toast temp = toast.maketext(sign_up.this, "this email exist here, must enter email sign up.", toast.length_short);                                             temp.show();                                         }                                     }                                     else{                                         toast temp = toast.maketext(sign_up.this, e+ "exception", toast.length_short);                                         temp.show();                                     }                                 }                               });