title: Write Api for spring boot district wise count of users on website and set their ranking based on count
body: <p>Every registration of user based on primary key its EmailId or MobileNo at time of profile creation.
  Eg.state, user(count), Rank :
  state 1.   user (count)3.   rank 2 ,
  state 2.   user (count)1.  rank 3 ,
  state 3.   user (count)5.  rank 1
  How will make api in spring boot for this scenario.</p>