user services and user repo

src/main/java/edu/uchicago/mpcs/topics/query/UserQuery.java

@@ -5,7 +5,7 @@ package edu.uchicago.mpcs.topics.query;
  */
 
 public final class UserQuery {
-    public static final String IS_USER_ID_EXIST = "SELECT count(ID) FROM USER WHERE email = :email";
+    public static final String IS_USER_ID_EXIST = "select count(ID) from user where email = :email";
     public static final String IS_AUTHENTICATED = "from User where email = :email and password = :password";
-    public static final String USER_BY_EMAIL = "from User WHERE email = :email";
+    public static final String USER_BY_EMAIL = "from User where email = :email";
 }