last ...

Controllers/Applications/ApplicationsController+ApiKey.cs

@@ -0,0 +1,9 @@
+namespace xIds.Controllers
+{
+    public partial class ApplicationsController
+    {
+        //
+        #region ApiKey ...
+        #endregion                
+    }
+}

Controllers/Applications/ApplicationsController+ApiKeyUsage.cs

@@ -0,0 +1,9 @@
+namespace xIds.Controllers
+{
+    public partial class ApplicationsController
+    {
+        //
+        #region ApiKeyUsage ...
+        #endregion        
+    }
+}

Controllers/Applications/ApplicationsController+Application.cs

@@ -0,0 +1,19 @@
+using xIdentityModels.Dtos;
+
+namespace xIds.Controllers
+{
+    public partial class ApplicationsController
+    {
+        //
+        #region Application ...
+        [HttpPost]
+        [RequireXPowered]
+        [Authorize(LocalApi.PolicyName)]
+        [Authorize(Policy = XPolicies.EnabledUser)]
+        public async Task<ActionResult<XApplicationDto>> CreateApplication(
+            [FromBody] XApplicationDto request,
+            CancellationToken cancellationToken = default
+        ) {}
+        #endregion
+    }
+}