diff --git a/Emby.Server.Implementations/Library/LibraryManager.cs b/Emby.Server.Implementations/Library/LibraryManager.cs
index 6fb6235541..9d244b74c8 100644
--- a/Emby.Server.Implementations/Library/LibraryManager.cs
+++ b/Emby.Server.Implementations/Library/LibraryManager.cs
@@ -710,10 +710,10 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Creates the root media folder
+        /// Creates the root media folder.
         /// </summary>
         /// <returns>AggregateFolder.</returns>
-        /// <exception cref="InvalidOperationException">Cannot create the root folder until plugins have loaded</exception>
+        /// <exception cref="InvalidOperationException">Cannot create the root folder until plugins have loaded.</exception>
         public AggregateFolder CreateRootFolder()
         {
             var rootFolderPath = ConfigurationManager.ApplicationPaths.RootFolderPath;
@@ -824,7 +824,6 @@ namespace Emby.Server.Implementations.Library
         {
             // If this returns multiple items it could be tricky figuring out which one is correct.
             // In most cases, the newest one will be and the others obsolete but not yet cleaned up
-
             if (string.IsNullOrEmpty(path))
             {
                 throw new ArgumentNullException(nameof(path));
@@ -844,7 +843,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Person
+        /// Gets the person.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{Person}.</returns>
@@ -854,7 +853,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Studio
+        /// Gets the studio.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{Studio}.</returns>
@@ -879,7 +878,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Genre
+        /// Gets the genre.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{Genre}.</returns>
@@ -889,7 +888,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets the genre.
+        /// Gets the music genre.
         /// </summary>
         /// <param name="name">The name.</param>
         /// <returns>Task{MusicGenre}.</returns>
@@ -899,7 +898,7 @@ namespace Emby.Server.Implementations.Library
         }
 
         /// <summary>
-        /// Gets a Year
+        /// Gets the year.
         /// </summary>
         /// <param name="value">The value.</param>
         /// <returns>Task{Year}.</returns>
@@ -1076,9 +1075,9 @@ namespace Emby.Server.Implementations.Library
 
             var innerProgress = new ActionableProgress<double>();
 
-            innerProgress.RegisterAction(pct => progress.Report(pct * .96));
+            innerProgress.RegisterAction(pct => progress.Report(pct * pct * 0.96));
 
-            // Now validate the entire media library
+            // validate the entire media library
             await RootFolder.ValidateChildren(innerProgress, cancellationToken, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), recursive: true).ConfigureAwait(false);
 
             progress.Report(96);
@@ -1087,7 +1086,6 @@ namespace Emby.Server.Implementations.Library
 
             innerProgress.RegisterAction(pct => progress.Report(96 + (pct * .04)));
 
-            // Run post-scan tasks
             await RunPostScanTasks(innerProgress, cancellationToken).ConfigureAwait(false);
 
             progress.Report(100);
@@ -1138,7 +1136,7 @@ namespace Emby.Server.Implementations.Library
                 }
                 catch (Exception ex)
                 {
-                    _logger.LogError(ex, "Error running postscan task");
+                    _logger.LogError(ex, "Error running post-scan task");
                 }
 
                 numComplete++;
diff --git a/Emby.Server.Implementations/Library/UserManager.cs b/Emby.Server.Implementations/Library/UserManager.cs
index 656eeb1459..a5d7153d7f 100644
--- a/Emby.Server.Implementations/Library/UserManager.cs
+++ b/Emby.Server.Implementations/Library/UserManager.cs
@@ -291,10 +291,11 @@ namespace Emby.Server.Implementations.Library
                     && authenticationProvider != null
                     && !(authenticationProvider is DefaultAuthenticationProvider))
                 {
-                    // We should trust the user that the authprovider says, not what was typed
+                    // trust the username returned by the authentication provider
                     username = updatedUsername;
 
-                    // Search the database for the user again; the authprovider might have created it
+                    // search the database for the user again
+                    // the authentication provider might have created it
                     user = Users
                         .FirstOrDefault(i => string.Equals(username, i.Name, StringComparison.OrdinalIgnoreCase));
 
diff --git a/Emby.Server.Implementations/Session/SessionManager.cs b/Emby.Server.Implementations/Session/SessionManager.cs
index b1d513dd4f..72e4e151e4 100644
--- a/Emby.Server.Implementations/Session/SessionManager.cs
+++ b/Emby.Server.Implementations/Session/SessionManager.cs
@@ -30,17 +30,17 @@ using Microsoft.Extensions.Logging;
 namespace Emby.Server.Implementations.Session
 {
     /// <summary>
-    /// Class SessionManager
+    /// Class SessionManager.
     /// </summary>
     public class SessionManager : ISessionManager, IDisposable
     {
         /// <summary>
-        /// The _user data repository
+        /// The user data repository.
         /// </summary>
         private readonly IUserDataManager _userDataManager;
 
         /// <summary>
-        /// The _logger
+        /// The logger.
         /// </summary>
         private readonly ILogger _logger;
 
@@ -57,7 +57,7 @@ namespace Emby.Server.Implementations.Session
         private readonly IDeviceManager _deviceManager;
 
         /// <summary>
-        /// The _active connections
+        /// The active connections.
         /// </summary>
         private readonly ConcurrentDictionary<string, SessionInfo> _activeConnections =
             new ConcurrentDictionary<string, SessionInfo>(StringComparer.OrdinalIgnoreCase);
@@ -70,18 +70,23 @@ namespace Emby.Server.Implementations.Session
         /// Occurs when [playback start].
         /// </summary>
         public event EventHandler<PlaybackProgressEventArgs> PlaybackStart;
+
         /// <summary>
         /// Occurs when [playback progress].
         /// </summary>
         public event EventHandler<PlaybackProgressEventArgs> PlaybackProgress;
+
         /// <summary>
         /// Occurs when [playback stopped].
         /// </summary>
         public event EventHandler<PlaybackStopEventArgs> PlaybackStopped;
 
         public event EventHandler<SessionEventArgs> SessionStarted;
+
         public event EventHandler<SessionEventArgs> CapabilitiesChanged;
+
         public event EventHandler<SessionEventArgs> SessionEnded;
+
         public event EventHandler<SessionEventArgs> SessionActivity;
 
         public SessionManager(
@@ -924,7 +929,6 @@ namespace Emby.Server.Implementations.Session
                     ClientName = session.Client,
                     DeviceId = session.DeviceId,
                     Session = session
-
                 },
                 _logger);
         }
@@ -1610,7 +1614,7 @@ namespace Emby.Server.Implementations.Session
         private DtoOptions _itemInfoDtoOptions;
 
         /// <summary>
-        /// Converts a BaseItem to a BaseItemInfo
+        /// Converts a BaseItem to a BaseItemInfo.
         /// </summary>
         private BaseItemDto GetItemInfo(BaseItem item, MediaSourceInfo mediaSource)
         {
@@ -1680,7 +1684,7 @@ namespace Emby.Server.Implementations.Session
             }
             catch (Exception ex)
             {
-                _logger.LogError("Error getting {0} image info", ex, type);
+                _logger.LogError("Error getting image information for {0}", ex, type);
                 return null;
             }
         }
diff --git a/MediaBrowser.Api/Session/SessionsService.cs b/MediaBrowser.Api/Session/SessionsService.cs
index 700861c554..9aa7b2c88a 100644
--- a/MediaBrowser.Api/Session/SessionsService.cs
+++ b/MediaBrowser.Api/Session/SessionsService.cs
@@ -18,7 +18,7 @@ using Microsoft.Extensions.Logging;
 namespace MediaBrowser.Api.Session
 {
     /// <summary>
-    /// Class GetSessions
+    /// Class GetSessions.
     /// </summary>
     [Route("/Sessions", "GET", Summary = "Gets a list of sessions")]
     [Authenticated]
@@ -34,7 +34,7 @@ namespace MediaBrowser.Api.Session
     }
 
     /// <summary>
-    /// Class DisplayContent
+    /// Class DisplayContent.
     /// </summary>
     [Route("/Sessions/{Id}/Viewing", "POST", Summary = "Instructs a session to browse to an item or view")]
     [Authenticated]
diff --git a/MediaBrowser.Api/UserService.cs b/MediaBrowser.Api/UserService.cs
index e1b01b012c..0d63c19b5e 100644
--- a/MediaBrowser.Api/UserService.cs
+++ b/MediaBrowser.Api/UserService.cs
@@ -281,7 +281,6 @@ namespace MediaBrowser.Api
             {
                 IsHidden = false,
                 IsDisabled = false
-
             }, true, true);
         }
 
@@ -395,10 +394,11 @@ namespace MediaBrowser.Api
                 throw new MethodNotAllowedException("Hashed-only passwords are not valid for this API.");
             }
 
+            // password should always be null
             return Post(new AuthenticateUserByName
             {
                 Username = user.Name,
-                Password = null, // This should always be null
+                Password = null,
                 Pw = request.Pw
             });
         }
diff --git a/MediaBrowser.Controller/Session/SessionInfo.cs b/MediaBrowser.Controller/Session/SessionInfo.cs
index acda6a4166..6e8385cf85 100644
--- a/MediaBrowser.Controller/Session/SessionInfo.cs
+++ b/MediaBrowser.Controller/Session/SessionInfo.cs
@@ -126,12 +126,6 @@ namespace MediaBrowser.Controller.Session
         [JsonIgnore]
         public ISessionController[] SessionControllers { get; set; }
 
-        /// <summary>
-        /// Gets or sets the application icon URL.
-        /// </summary>
-        /// <value>The application icon URL.</value>
-        public string AppIconUrl { get; set; }
-
         /// <summary>
         /// Gets or sets the supported commands.
         /// </summary>
@@ -259,7 +253,7 @@ namespace MediaBrowser.Controller.Session
 
             foreach (var additionalUser in AdditionalUsers)
             {
-                if (userId.Equals(userId))
+                if (additionalUser.UserId.Equals(userId))
                 {
                     return true;
                 }
@@ -321,7 +315,7 @@ namespace MediaBrowser.Controller.Session
 
             var newPositionTicks = positionTicks + ProgressIncrement;
             var item = progressInfo.Item;
-            long? runtimeTicks = item == null ? null : item.RunTimeTicks;
+            long? runtimeTicks = item?.RunTimeTicks;
 
             // Don't report beyond the runtime
             if (runtimeTicks.HasValue && newPositionTicks >= runtimeTicks.Value)