Add project files.

Core.Cerberos.Adapters/Contracts/ITokenProvider.cs

@@ -0,0 +1,19 @@
+// ***********************************************************************
+// <copyright file="ITokenProvider.cs">
+//     Heath
+// </copyright>
+// ***********************************************************************
+
+namespace Core.Cerberos.Adapters.Contracts
+{
+    /// <summary>
+    /// Interface for token provider.
+    /// </summary>
+    public interface ITokenProvider
+    {
+        /// <summary>
+        /// Get token from headers.
+        /// </summary>
+        string GetToken();
+    }
+}