Move appbuilder and service collection to Jellyfin.Server

Jellyfin.Api/Models/StartupDtos/StartupUserDto.cs

@@ -0,0 +1,18 @@
+namespace Jellyfin.Api.Models.StartupDtos
+{
+    /// <summary>
+    /// The startup user DTO.
+    /// </summary>
+    public class StartupUserDto
+    {
+        /// <summary>
+        /// Gets or sets the username.
+        /// </summary>
+        public string Name { get; set; }
+
+        /// <summary>
+        /// Gets or sets the user's password.
+        /// </summary>
+        public string Password { get; set; }
+    }
+}