GetClients.cs

public class Config
    {
        public static IEnumerable<Client> GetClients()
        {
            return new List<Client>
            {
                new Client
                {
                    ClientId = "client1",

                    // no interactive user, use the clientid/secret for authentication
                    AllowedGrantTypes = GrantTypes.ClientCredentials,

                    // secret for authentication
                    ClientSecrets =
                    {
                        new Secret("123654".Sha256())
                    },

                    // scopes that client has access to
                    AllowedScopes = {"Api1"},
                    Claims = new[]
                    {
                        new Claim("Employee", "Mosalla"),
                        new Claim("website", "http://hamidmosalla.com")
                    },
                    ClientClaimsPrefix = ""
                },
                new Client
                {
                    ClientId = "ro.client1",
                    AllowedGrantTypes = GrantTypes.ResourceOwnerPassword,

                    ClientSecrets =
                    {
                        new Secret("123654".Sha256())
                    },
                    AllowedScopes = {"Api1"}
                }
            };
        }
    }