Always getting "invalid_client" from Identity Server

Question

Everything seems normal but it is not working, It returns "Invalid_Client" - (400 - Bad request). Both side so simple below;

Identity Server Code:

                new Client
                {
                    ClientId = "js",
                    ClientSecrets = {
                        new Secret("secret".Sha256())
                    },
                    AllowedGrantTypes = GrantTypes.ClientCredentials,
                    RequireClientSecret = false,
                    AllowedScopes =
                    {
                        "api1"
                    }
                }

Javascript Client Code:

axios.post('http://localhost:5000/connect/token',request, {
        headers: {
             'client_id' : 'js',
             'client_secret' : 'secret',
             'grant_type': 'client_credentials',
             'scope' : 'api1'

             }});

Answer 1

Should not use normall fetch or axis.

Because the service is Oauth service and should be use 'client-oauth2' library.

Code Example:

     var ClientOAuth2 = require("client-oauth2");
     var authRequest = new ClientOAuth2({
     clientId: IDENTITY_CONFIG.client_id,
     clientSecret: IDENTITY_CONFIG.client_secret,
     accessTokenUri: IDENTITY_CONFIG.token_endpoint,
     scopes: [IDENTITY_CONFIG.grantType]
  });

  return authRequest.credentials.getToken();