Add Application Approximate User Install Count (#2978)

* Add Application Approximate User Install Count

* fix rider formatting moment

src/Discord.Net.Core/Entities/Applications/IApplication.cs

@@ -95,6 +95,11 @@ namespace Discord
         /// </summary>
         int? ApproximateGuildCount { get; }
 
+        /// <summary>
+        ///     Gets the approximate count of the users the application was added to. <see langword="null" /> if not returned.
+        /// </summary>
+        int? ApproximateUserInstallCount { get; }
+
         /// <summary>
         ///     Gets the application's discoverability state.
         /// </summary>

src/Discord.Net.Rest/API/Common/Application.cs

@@ -38,6 +38,9 @@ internal class Application
     [JsonProperty("approximate_guild_count")]
     public Optional<int> ApproximateGuildCount { get; set; }
 
+    [JsonProperty("approximate_user_install_count")]
+    public Optional<int> ApproximateUserInstallCount { get; set; }
+
     [JsonProperty("guild")]
     public Optional<PartialGuild> PartialGuild { get; set; }
 

src/Discord.Net.Rest/Entities/RestApplication.cs

@@ -55,6 +55,9 @@ public class RestApplication : RestEntity<ulong>, IApplication
     /// <inheritdoc />
     public int? ApproximateGuildCount { get; private set; }
 
+    /// <inheritdoc />
+    public int? ApproximateUserInstallCount { get; private set; }
+
     /// <inheritdoc />
     public IReadOnlyCollection<string> RedirectUris { get; private set; }
 
@@ -152,6 +155,7 @@ public class RestApplication : RestEntity<ulong>, IApplication
             RedirectUris = model.RedirectUris.Value.ToImmutableArray();
 
         ApproximateGuildCount = model.ApproximateGuildCount.IsSpecified ? model.ApproximateGuildCount.Value : null;
+        ApproximateUserInstallCount = model.ApproximateUserInstallCount.IsSpecified ? model.ApproximateUserInstallCount.Value : null;
 
         DiscoverabilityState = model.DiscoverabilityState.GetValueOrDefault(ApplicationDiscoverabilityState.None);
         DiscoveryEligibilityFlags = model.DiscoveryEligibilityFlags.GetValueOrDefault(DiscoveryEligibilityFlags.None);
@@ -168,7 +172,7 @@ public class RestApplication : RestEntity<ulong>, IApplication
         RpcState = model.RpcState.GetValueOrDefault(ApplicationRpcState.Disabled);
         StoreState = model.StoreState.GetValueOrDefault(ApplicationStoreState.None);
         VerificationState = model.VerificationState.GetValueOrDefault(ApplicationVerificationState.Ineligible);
-            
+
         var dict = new Dictionary<ApplicationIntegrationType, ApplicationInstallParams>();
         if (model.IntegrationTypesConfig.IsSpecified)
         {