Add missing document types (#444)

Author: armando-rodriguez-cko

src/CheckoutSdk/Accounts/Entities/Common/Documents/Documents.cs

@@ -34,6 +34,12 @@ public class Documents
 
         public TaxVerification TaxVerification { get; set; }
 
+        // EEA Sole Trader (3.0) Representatives
+        
+        public ProofOfResidentialAddress ProofOfResidentialAddress { get; set; }
+        
+        public ProofOfRegistration ProofOfRegistration { get; set; }
+        
         // Unknown
 
         public FinancialVerification FinancialVerification { get; set; }

src/CheckoutSdk/Accounts/Entities/Common/Documents/ProofOfRegistration.cs

@@ -0,0 +1,9 @@
+namespace Checkout.Accounts.Entities.Common.Documents
+{
+    public class ProofOfRegistration
+    {
+        public ProofOfRegistrationType? Type { get; set; }
+
+        public string Front { get; set; }
+    }
+}

src/CheckoutSdk/Accounts/Entities/Common/Documents/ProofOfRegistrationType.cs

@@ -0,0 +1,10 @@
+using System.Runtime.Serialization;
+
+namespace Checkout.Accounts.Entities.Common.Documents
+{
+    public enum ProofOfRegistrationType
+    {
+        [EnumMember(Value = "extract_from_trade_register")] ExtractFromTradeRegister,
+        [EnumMember(Value = "other")] Other
+    }
+}

src/CheckoutSdk/Accounts/Entities/Common/Documents/ProofOfResidentialAddress.cs

@@ -0,0 +1,9 @@
+namespace Checkout.Accounts.Entities.Common.Documents
+{
+    public class ProofOfResidentialAddress
+    {
+        public ProofOfResidentialAddressType? Type { get; set; }
+
+        public string Front { get; set; }
+    }
+}

src/CheckoutSdk/Accounts/Entities/Common/Documents/ProofOfResidentialAddressType.cs

@@ -0,0 +1,9 @@
+using System.Runtime.Serialization;
+
+namespace Checkout.Accounts.Entities.Common.Documents
+{
+    public enum ProofOfResidentialAddressType
+    {
+        [EnumMember(Value = "proof_of_address")] ProofOfAddress
+    }
+}