Add metrics for OAuth and token logins.

Author: Steven Kirk

src/GitHub.Exports/Models/UsageModel.cs

@@ -21,6 +21,8 @@ public class UsageModel
         public int NumberOfOpenInGitHub { get; set; }
         public int NumberOfLinkToGitHub { get; set; }
         public int NumberOfLogins { get; set; }
+        public int NumberOfOAuthLogins { get; set; }
+        public int NumberOfTokenLogins { get; set; }
         public int NumberOfPullRequestsOpened { get; set; }
         public int NumberOfLocalPullRequestsCheckedOut { get; set; }
         public int NumberOfLocalPullRequestPulls { get; set; }

src/GitHub.VisualStudio/Services/ConnectionManager.cs

@@ -106,6 +106,7 @@ public async Task<IConnection> LogInViaOAuth(HostAddress address, CancellationTo
             conns.Add(connection);
             await SaveConnections();
             await usageTracker.IncrementCounter(x => x.NumberOfLogins);
+            await usageTracker.IncrementCounter(x => x.NumberOfOAuthLogins);
             return connection;
         }
 
@@ -126,6 +127,7 @@ public async Task<IConnection> LogInWithToken(HostAddress address, string token)
             conns.Add(connection);
             await SaveConnections();
             await usageTracker.IncrementCounter(x => x.NumberOfLogins);
+            await usageTracker.IncrementCounter(x => x.NumberOfTokenLogins);
             return connection;
         }