angular sign in form getting cleared

gistfile1.js

  function SignInCtrl(                                                                    
    $rootScope,                                                                           
    $scope,                                                                               
    credentials,                                                                          
    events,                                                                               
    handleUser,                                                                           
    User                                                                                  
  ){                                                                                      
    $scope.isLoading = false;                                                             
    $scope.generalError = '';                                                             
    $scope.hasBeenSubmitted = false;                                                      
                                                                                          
    $scope.submit=function(){                                                             
      var password = $scope.signin.password.$modelValue;                                  
      var username = $scope.signin.username.$modelValue;                                  
      var rememberMe = $scope.signin.rememberMe.$modelValue;                              
      var query = {                                                                       
        userId: username                                                                  
      };                                                                                  
                                                                                          
      if(rememberMe)query.rememberMe = rememberMe;                                        
                                                                                          
      //reset                                                                             
      $scope.generalError='';                                                             
      $scope.hasBeenSubmitted=true;                                                       
                                                                                          
      if($scope.signin.$invalid || $scope.isLoading){                                     
~       return false;                                                                     
      }                                                                                   
                                                                                          
      credentials.set(username, password);                                                
                                                                                          
      User.get(                                                                           
        query,                                                                            
        function(user){                                                                   
          $scope.isLoading = false;                                                       
          $scope.generalError='';                                                         
          $scope.hasBeenSubmitted=false;                                                  
          //success                                                            
        },                                                                                
        function(response){                                                               
          $scope.generalError = response.data;                                            
          $scope.isLoading = false;    
          //failure                                                   
        }                                                                                 
      );                                                                                  
      $scope.isLoading = true;                                                            
    };                                                                                    
  }  

gistfile2.txt

form(                                                                                
  ng-controller="SignInCtrl",                                                        
  ng-submit="submit()",                                                              
  ng-cloak,                                                                          
  name="signin",                                                                     
  ng-class="{\                                                                       
    'is-submitted-true': isLoading,\                                                 
    'is-submitted-false': isLoading\                                                 
  }",                                                                                
  ng-if="!state.registering",                                                        
  class="sign-in",                                                                   
  novalidate                                                                         
)