added missing dependencies

IdentityProvider/IdentityProvider.csproj

 
   <ItemGroup>
     <Protobuf Include="Protos\greet.proto" GrpcServices="Server" />
+    <Protobuf Include="Protos\auth.proto" GrpcServices="Server" />
   </ItemGroup>
 
   <ItemGroup>

IdentityProvider/Protos/auth.proto

 
 message AuthResponse {
 	string code = 1;
+}
+
+message AccessResponse {
+	string access_token = 1;
 }