title: Client doesn't have permission to access the desired data in Firebase
body: <p>I have a page that is calling <code>addCheckin()</code> method which is inside a controller. In the controller, I am trying to create a reference as follows:</p>
  
  <pre><code>var ref = firebase.database().ref("users/" + $scope.whichuser + "/meetings/" +$scope.whichmeeting + "/checkins");
  </code></pre>
  
  <p><code>$scope.whichuser</code> and <code>$scope.whichmeeting</code> are the <code>$routeParams</code> that I am passing from another route.
  Here's my checkin controller-</p>
  
  <pre><code>myApp.controller("CheckinsController",
      ['$scope','$rootScope','$firebaseArray','$routeParams','$firebaseObject',
      function($scope,$rootScope,$firebaseArray,$routeParams,$firebaseObject){
  
          $scope.whichuser = $routeParams.uid;
          $scope.whichmeeting = $routeParams.mid;
  
          var ref = firebase.database().ref("users/" + $scope.whichuser + "/meetings/" +$scope.whichmeeting + "/checkins");
  
          $scope.addCheckin = function(){
              var checkinInfo = $firebaseArray(ref);
              var data={
                  firstname:$scope.firstname,
                  lastname:$scope.lastname,
                  email:$scope.email,
                  date:firebase.database.ServerValue.TIMESTAMP
              }
  
              checkinInfo.$add(data);
          }
  
  }]);/*controller*/
  </code></pre>
  
  <p>There are two errors that I am getting here-</p>
  
  <p>Error 1:</p>
  
  <p><code>Error: permission_denied at /users/Vp2P1MqKm7ckXqV2Uy3OzTnn6bB3/meetings: Client doesn't have permission to access the desired data.</code></p>
  
  <p>Error 2:</p>
  
  <p><code>Error: permission_denied at /users/Vp2P1MqKm7ckXqV2Uy3OzTnn6bB3/meetings/-KT5tqMYKXsFssmcRLm6/checkins: Client doesn't have permission to access the desired data.</code></p>
  
  <p>And this is what I am tring to achieve-</p>
  
  <p><a href="https://i.stack.imgur.com/WKNiI.png" rel="noreferrer"><img src="https://i.stack.imgur.com/WKNiI.png" alt="enter image description here"></a></p>