Add project files.

Models/DecodedSkinProperty.cs

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+using System.Text.Json.Serialization;
+
+namespace SkinsApi.Models
+{
+    public class Metadata
+    {
+        [JsonPropertyName("model")]
+        public string Model { get; set; }
+    }
+
+    public class DecodedSkinProperty
+    {
+        [JsonPropertyName("timestamp")]
+        public long Timestamp { get; set; }
+
+        [JsonPropertyName("profileId")]
+        public string ProfileId { get; set; }
+
+        [JsonPropertyName("profileName")]
+        public string ProfileName { get; set; }
+
+        [JsonPropertyName("textures")]
+        public Textures Textures { get; set; }
+    }
+
+    public class SKIN
+    {
+        [JsonPropertyName("url")]
+        public string Url { get; set; }
+
+        [JsonPropertyName("metadata")]
+        public Metadata Metadata { get; set; }
+    }
+
+    public class Textures
+    {
+        [JsonPropertyName("SKIN")]
+        public SKIN SKIN { get; set; }
+    }
+
+
+}

Models/SkinService/MojangProfile.cs

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+using SkinsApi.Interfaces.SkinService;
+
+namespace SkinsApi.Models.SkinService
+{
+    public class MojangProfile : IProfile
+    {
+        public string id { get; set; }
+        public string name { get; set; }
+    }
+}

Models/SkinService/MojangSessionProperty.cs

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+namespace SkinsApi.Models.SkinService
+{
+    public class Property
+    {
+        public string name { get; set; }
+        public string value { get; set; }
+    }
+
+    public class MojangSessionProperty
+    {
+        public string id { get; set; }
+        public string name { get; set; }
+        public List<Property> properties { get; set; }
+        public List<object> profileActions { get; set; }
+    }
+}