Made changes to get client credentials grant working

internal/flows/client_credentials.go

@@ -8,33 +8,34 @@ import (
 type ClientCredentialsFlowParams struct {
 	State        string `yaml:"state"`
 	ResponseType string `yaml:"response-type"`
+	Client       *oauth.Client
 }
 
 type ClientCredentialsFlowEndpoints struct {
-	Create    string
+	Clients   string
 	Authorize string
 	Token     string
 }
 
-func NewClientCredentialsFlow(eps ClientCredentialsFlowEndpoints, client *oauth.Client) error {
+func NewClientCredentialsFlow(eps ClientCredentialsFlowEndpoints, params ClientCredentialsFlowParams) (string, error) {
 	// register a new OAuth 2 client with authorization srever
-	_, err := client.CreateOAuthClient(eps.Create)
+	res, err := params.Client.CreateOAuthClient(eps.Clients, []oauth.GrantType{oauth.ClientCredentials})
 	if err != nil {
-		return fmt.Errorf("failed to register OAuth client: %v", err)
+		return "", fmt.Errorf("failed to register OAuth client: %v", err)
 	}
 
 	// authorize the client
-	_, err = client.AuthorizeOAuthClient(eps.Authorize)
+	res, err = params.Client.AuthorizeOAuthClient(eps.Authorize)
 	if err != nil {
-		return fmt.Errorf("failed to authorize client: %v", err)
+		return "", fmt.Errorf("failed to authorize client: %v", err)
 	}
 
 	// request a token from the authorization server
-	res, err := client.PerformTokenGrant(eps.Token, "")
+	res, err = params.Client.PerformClientCredentialsTokenGrant(eps.Token)
 	if err != nil {
-		return fmt.Errorf("failed to fetch token from authorization server: %v", err)
+		return "", fmt.Errorf("failed to fetch token from authorization server: %v", err)
 	}
 
 	fmt.Printf("token: %v\n", string(res))
-	return nil
+	return string(res), nil
 }