Major refactoring and code restructure

internal/flows/client_credentials.go

@@ -0,0 +1,40 @@
+package flows
+
+import (
+	"davidallendj/opaal/internal/oauth"
+	"fmt"
+)
+
+type ClientCredentialsFlowParams struct {
+	State        string `yaml:"state"`
+	ResponseType string `yaml:"response-type"`
+}
+
+type ClientCredentialsFlowEndpoints struct {
+	Create    string
+	Authorize string
+	Token     string
+}
+
+func NewClientCredentialsFlow(eps ClientCredentialsFlowEndpoints, client *oauth.Client) error {
+	// register a new OAuth 2 client with authorization srever
+	_, err := client.CreateOAuthClient(eps.Create)
+	if err != nil {
+		return fmt.Errorf("failed to register OAuth client: %v", err)
+	}
+
+	// authorize the client
+	_, err = client.AuthorizeOAuthClient(eps.Authorize)
+	if err != nil {
+		return fmt.Errorf("failed to authorize client: %v", err)
+	}
+
+	// request a token from the authorization server
+	res, err := client.PerformTokenGrant(eps.Token, "")
+	if err != nil {
+		return fmt.Errorf("failed to fetch token from authorization server: %v", err)
+	}
+
+	fmt.Printf("token: %v\n", string(res))
+	return nil
+}