De-provisioning SCIM Groups via REST API with Go

What You Will Build

A Go-based group de-provisioner that safely removes SCIM groups from Genesys Cloud CX by validating identity gateway constraints, executing member removal matrices, performing atomic deletion, synchronizing external directories via webhook callbacks, and generating structured audit logs with latency tracking. This tutorial uses the Genesys Cloud CX SCIM REST API and standard net/http client libraries. The implementation covers Go 1.21+ with context-aware request handling and exponential backoff for rate limiting.

Prerequisites

• OAuth 2.0 Client Credentials grant with scim:group:read, scim:group:write, scim:group:delete scopes
• Genesys Cloud CX API version 2 (SCIM endpoints)
• Go 1.21 or later
• Standard library dependencies: net/http, context, encoding/json, fmt, io, log, net/url, sync, time, crypto/rand, github.com/google/uuid (optional for testing)
• Access to an external webhook receiver endpoint for directory synchronization

Authentication Setup

Genesys Cloud CX uses bearer token authentication for all SCIM operations. The following example demonstrates a production-ready token acquisition and caching mechanism. The client must request the scim:group:* scopes during the initial authorization grant. Token expiration is handled by checking the exp claim and refreshing via the /oauth/token endpoint.

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"time"
)

type OAuthTokenResponse struct {
	AccessToken string `json:"access_token"`
	TokenType   string `json:"token_type"`
	ExpiresIn   int    `json:"expires_in"`
}

type TokenCache struct {
	token     string
	expiresAt time.Time
	mu        sync.Mutex
}

func NewTokenCache() *TokenCache {
	return &TokenCache{expiresAt: time.Time{}}
}

func (c *TokenCache) GetToken(ctx context.Context, baseURL, clientID, clientSecret string) (string, error) {
	c.mu.Lock()
	defer c.mu.Unlock()

	if c.token != "" && time.Now().Before(c.expiresAt.Add(-5*time.Minute)) {
		return c.token, nil
	}

	reqBody := fmt.Sprintf("grant_type=client_credentials&scope=scim:group:read+scim:group:write+scim:group:delete")
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/oauth/token", baseURL), bytes.NewBufferString(reqBody))
	if err != nil {
		return "", fmt.Errorf("failed to create token request: %w", err)
	}

	req.SetBasicAuth(clientID, clientSecret)
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		return "", fmt.Errorf("token request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return "", fmt.Errorf("token request returned status %d", resp.StatusCode)
	}

	var tokenResp OAuthTokenResponse
	if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
		return "", fmt.Errorf("failed to decode token response: %w", err)
	}

	c.token = tokenResp.AccessToken
	c.expiresAt = time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
	return c.token, nil
}

The token cache implements a sliding window refresh strategy. The five-minute buffer prevents edge-case expiration during high-throughput de-provisioning batches. The scim:group:delete scope is mandatory for atomic removal operations.

Implementation

Step 1: Initialize HTTP Client with 429 Retry Logic

Genesys Cloud CX enforces strict rate limits on SCIM endpoints. A 429 Too Many Requests response includes a Retry-After header. The following client wraps the standard http.Client and implements exponential backoff with jitter.

type RetryHTTPClient struct {
	base    *http.Client
	maxRetries int
	baseDelay time.Duration
}

func (c *RetryHTTPClient) Do(req *http.Request) (*http.Response, error) {
	var resp *http.Response
	var err error

	for attempt := 0; attempt <= c.maxRetries; attempt++ {
		resp, err = c.base.Do(req)
		if err != nil {
			return nil, fmt.Errorf("HTTP request failed: %w", err)
		}

		if resp.StatusCode != http.StatusTooManyRequests {
			return resp, nil
		}

		retryAfter := 0
		if ra := resp.Header.Get("Retry-After"); ra != "" {
			fmt.Sscanf(ra, "%d", &retryAfter)
		}

		if retryAfter <= 0 {
			retryAfter = int(c.baseDelay.Seconds()) * (1 << attempt)
			if retryAfter > 30 {
				retryAfter = 30
			}
		}

		time.Sleep(time.Duration(retryAfter) * time.Second)
	}

	return resp, fmt.Errorf("exceeded maximum retries for rate limit")
}

HTTP Request Cycle Example:

GET /api/v2/scim/groups/{groupId} HTTP/1.1
Host: mydomain.genesyscloud.com
Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...
Accept: application/json
User-Agent: scim-deprovisioner/1.0

Expected Response:

{
  "schemas": ["urn:ietf:params:scim:schemas:core:2.0:Group"],
  "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "displayName": "Support Tier 1",
  "members": [
    {"value": "user-uuid-1", "$ref": "https://mydomain.genesyscloud.com/api/v2/scim/users/user-uuid-1", "display": "Alice Smith"},
    {"value": "user-uuid-2", "$ref": "https://mydomain.genesyscloud.com/api/v2/scim/users/user-uuid-2", "display": "Bob Jones"}
  ]
}

Step 2: Validate Group Constraints and Dependency Checking

Before de-provisioning, the system must verify identity gateway constraints. Genesys Cloud CX enforces a maximum member count per SCIM group (typically 500). The validation pipeline also checks for routing profile dependencies to prevent orphaned access assignments.

type SCIMGroup struct {
	ID          string      `json:"id"`
	DisplayName string      `json:"displayName"`
	Members     []SCIMMember `json:"members"`
}

type SCIMMember struct {
	Value   string `json:"value"`
	Display string `json:"display"`
}

type UserRoutingProfile struct {
	ID   string `json:"id"`
	Name string `json:"name"`
}

func (d *GroupDeprovisioner) ValidateGroupConstraints(ctx context.Context, groupID string) error {
	req, err := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/api/v2/scim/groups/%s", d.baseURL, groupID), nil)
	if err != nil {
		return fmt.Errorf("failed to create validation request: %w", err)
	}
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.token))
	req.Header.Set("Accept", "application/json")

	resp, err := d.client.Do(req)
	if err != nil {
		return fmt.Errorf("validation request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode == http.StatusNotFound {
		return fmt.Errorf("group %s does not exist", groupID)
	}
	if resp.StatusCode != http.StatusOK {
		return fmt.Errorf("validation failed with status %d", resp.StatusCode)
	}

	var group SCIMGroup
	if err := json.NewDecoder(resp.Body).Decode(&group); err != nil {
		return fmt.Errorf("failed to decode group payload: %w", err)
	}

	const maxMemberLimit = 500
	if len(group.Members) > maxMemberLimit {
		return fmt.Errorf("group %s exceeds identity gateway constraint: %d members (max %d)", groupID, len(group.Members), maxMemberLimit)
	}

	for _, member := range group.Members {
		if err := d.checkUserDependencies(ctx, member.Value); err != nil {
			return fmt.Errorf("orphan prevention check failed for user %s: %w", member.Value, err)
		}
	}

	return nil
}

func (d *GroupDeprovisioner) checkUserDependencies(ctx context.Context, userID string) error {
	req, _ := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/api/v2/users/%s/routing/profile", d.baseURL, userID), nil)
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.token))
	
	resp, err := d.client.Do(req)
	if err != nil {
		return fmt.Errorf("dependency check failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode == http.StatusNotFound {
		return fmt.Errorf("routing profile not found for user %s", userID)
	}
	if resp.StatusCode != http.StatusOK {
		return fmt.Errorf("routing profile check returned %d", resp.StatusCode)
	}

	return nil
}

The dependency check queries the user routing profile endpoint. If the profile is missing or inactive, the de-provisioner halts to prevent access residue. The maximum member limit validation aligns with Genesys Cloud CX identity gateway constraints.

Step 3: Construct Member Removal Matrix and Execute Cascade Patch

SCIM groups require explicit member removal before deletion to trigger automatic membership cleanup. The following method constructs a removal matrix using the standard SCIM PATCH operation format.

type SCIMPatchOperation struct {
	Op   string `json:"op"`
	Path string `json:"path,omitempty"`
	Value interface{} `json:"value,omitempty"`
}

type SCIMPatchPayload struct {
	Schemas    []string             `json:"schemas"`
	Operations []SCIMPatchOperation `json:"Operations"`
}

func (d *GroupDeprovisioner) ExecuteCascadeRemoval(ctx context.Context, groupID string) error {
	payload := SCIMPatchPayload{
		Schemas: []string{"urn:ietf:params:scim:api:messages:2.0:PatchOp"},
		Operations: []SCIMPatchOperation{
			{Op: "remove", Path: "members"},
		},
	}

	body, err := json.Marshal(payload)
	if err != nil {
		return fmt.Errorf("failed to marshal removal matrix: %w", err)
	}

	req, err := http.NewRequestWithContext(ctx, http.MethodPatch, fmt.Sprintf("%s/api/v2/scim/groups/%s", d.baseURL, groupID), bytes.NewBuffer(body))
	if err != nil {
		return fmt.Errorf("failed to create cascade request: %w", err)
	}
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.token))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept", "application/json")

	resp, err := d.client.Do(req)
	if err != nil {
		return fmt.Errorf("cascade removal failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK {
		return fmt.Errorf("cascade removal returned status %d", resp.StatusCode)
	}

	return nil
}

HTTP Request Cycle Example:

PATCH /api/v2/scim/groups/a1b2c3d4-e5f6-7890-abcd-ef1234567890 HTTP/1.1
Host: mydomain.genesyscloud.com
Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...
Content-Type: application/json
Accept: application/json

{
  "schemas": ["urn:ietf:params:scim:api:messages:2.0:PatchOp"],
  "Operations": [
    {"op": "remove", "path": "members"}
  ]
}

Expected Response:

HTTP/1.1 204 No Content

The remove operation on the members path clears all associations. Genesys Cloud CX automatically triggers membership cleanup routines when this payload is applied. The operation returns 204 No Content upon success.

Step 4: Perform Atomic DELETE and Trigger Webhook Synchronization

After member removal, the system executes an atomic DELETE operation. The de-provisioner tracks latency, updates success metrics, dispatches a webhook callback for external directory alignment, and generates a structured audit log entry.

type DeprovisionAuditEntry struct {
	Timestamp    string  `json:"timestamp"`
	GroupID      string  `json:"group_id"`
	Action       string  `json:"action"`
	Status       string  `json:"status"`
	LatencyMs    float64 `json:"latency_ms"`
	Error        string  `json:"error,omitempty"`
	WebhookSync  bool    `json:"webhook_synced"`
}

func (d *GroupDeprovisioner) DeleteGroup(ctx context.Context, groupID string) error {
	start := time.Now()
	
	req, err := http.NewRequestWithContext(ctx, http.MethodDelete, fmt.Sprintf("%s/api/v2/scim/groups/%s", d.baseURL, groupID), nil)
	if err != nil {
		return fmt.Errorf("failed to create delete request: %w", err)
	}
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.token))

	resp, err := d.client.Do(req)
	if err != nil {
		return fmt.Errorf("atomic delete failed: %w", err)
	}
	defer resp.Body.Close()

	latency := time.Since(start).Milliseconds()

	if resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK {
		d.logAudit(groupID, "DELETE", "FAILED", float64(latency), fmt.Sprintf("status %d", resp.StatusCode), false)
		return fmt.Errorf("atomic delete returned status %d", resp.StatusCode)
	}

	webhookSynced := d.triggerWebhookSync(ctx, groupID)
	d.logAudit(groupID, "DELETE", "SUCCESS", float64(latency), "", webhookSynced)
	
	d.mu.Lock()
	d.metrics.Successes++
	d.metrics.Attempts++
	d.metrics.Latency += time.Duration(latency) * time.Millisecond
	d.mu.Unlock()

	return nil
}

func (d *GroupDeprovisioner) triggerWebhookSync(ctx context.Context, groupID string) bool {
	payload := map[string]interface{}{
		"event":     "group_deprovisioned",
		"group_id":  groupID,
		"timestamp": time.Now().UTC().Format(time.RFC3339),
		"source":    "genesys_scim_deprovisioner",
	}
	body, _ := json.Marshal(payload)

	req, err := http.NewRequestWithContext(ctx, http.MethodPost, d.webhookURL, bytes.NewBuffer(body))
	if err != nil {
		log.Printf("Webhook request creation failed: %v", err)
		return false
	}
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{Timeout: 5 * time.Second}
	resp, err := client.Do(req)
	if err != nil || resp.StatusCode >= 400 {
		log.Printf("Webhook sync failed: %v", err)
		return false
	}
	return true
}

func (d *GroupDeprovisioner) logAudit(groupID, action, status string, latencyMs float64, errMsg string, webhookSynced bool) {
	entry := DeprovisionAuditEntry{
		Timestamp:   time.Now().UTC().Format(time.RFC3339),
		GroupID:     groupID,
		Action:      action,
		Status:      status,
		LatencyMs:   latencyMs,
		Error:       errMsg,
		WebhookSync: webhookSynced,
	}
	jsonData, _ := json.Marshal(entry)
	fmt.Fprintln(d.auditLog, string(jsonData))
}

The atomic DELETE operation removes the group container. Genesys Cloud CX returns 204 No Content when the group is successfully removed. The webhook callback synchronizes the de-provisioning event with external identity providers. The audit log writer receives structured JSON entries containing latency, status, and synchronization flags.

Complete Working Example

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log"
	"net/http"
	"os"
	"sync"
	"time"
)

type GroupDeprovisioner struct {
	client     *http.Client
	baseURL    string
	token      string
	webhookURL string
	auditLog   io.Writer
	metrics    struct {
		Attempts  int
		Successes int
		Latency   time.Duration
	}
	mu sync.Mutex
}

func NewGroupDeprovisioner(baseURL, token, webhookURL string, auditLog io.Writer) *GroupDeprovisioner {
	return &GroupDeprovisioner{
		client: &http.Client{Timeout: 30 * time.Second},
		baseURL: baseURL,
		token:   token,
		webhookURL: webhookURL,
		auditLog: auditLog,
	}
}

func (d *GroupDeprovisioner) DeprovisionGroup(ctx context.Context, groupID string) error {
	start := time.Now()

	if err := d.ValidateGroupConstraints(ctx, groupID); err != nil {
		return fmt.Errorf("validation failed: %w", err)
	}

	if err := d.ExecuteCascadeRemoval(ctx, groupID); err != nil {
		return fmt.Errorf("cascade removal failed: %w", err)
	}

	if err := d.DeleteGroup(ctx, groupID); err != nil {
		return fmt.Errorf("atomic delete failed: %w", err)
	}

	fmt.Printf("Group %s de-provisioned successfully in %v\n", groupID, time.Since(start))
	return nil
}

func main() {
	baseURL := "https://mydomain.genesyscloud.com"
	token := "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9..."
	webhookURL := "https://external-identity-sync.example.com/webhooks/genesys"
	groupID := "a1b2c3d4-e5f6-7890-abcd-ef1234567890"

	auditFile, err := os.Create("deprovision_audit.log")
	if err != nil {
		log.Fatalf("Failed to create audit log: %v", err)
	}
	defer auditFile.Close()

	deprovisioner := NewGroupDeprovisioner(baseURL, token, webhookURL, auditFile)
	ctx := context.Background()

	if err := deprovisioner.DeprovisionGroup(ctx, groupID); err != nil {
		log.Fatalf("Deprovisioning failed: %v", err)
	}
}

This example integrates all components into a single executable workflow. The DeprovisionGroup method orchestrates validation, cascade removal, atomic deletion, and synchronization. Replace the placeholder credentials and group identifier with production values before execution.

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: Expired bearer token or missing scim:group:* scopes in the OAuth grant.
• Fix: Refresh the token using the /oauth/token endpoint. Verify the client credentials scope configuration in the Genesys Cloud admin console.
• Code Fix: Implement the TokenCache refresh logic from the Authentication Setup section.

Error: 403 Forbidden

• Cause: The OAuth client lacks scim:group:delete scope or the user role does not have SCIM administration permissions.
• Fix: Assign the scim:group:delete scope to the API key. Verify the associated user has the Organization Administrator or SCIM Administrator role.

Error: 409 Conflict

• Cause: The group contains users with active routing assignments or queue memberships that violate orphan prevention rules.
• Fix: Reassign users to alternative queues before de-provisioning. The validation pipeline will block removal until dependencies are resolved.
• Code Fix: Update the checkUserDependencies method to return actionable reassignment instructions instead of hard failures.

Error: 429 Too Many Requests

• Cause: Exceeded Genesys Cloud CX rate limits for SCIM endpoints.
• Fix: Implement exponential backoff with jitter. The RetryHTTPClient handles this automatically.
• Code Fix: Wrap the base client in RetryHTTPClient before passing to GroupDeprovisioner.

Error: 404 Not Found

• Cause: The group identifier does not exist or was already removed by another process.
• Fix: Verify the group ID using GET /api/v2/scim/groups/{id} before initiating the de-provisioning pipeline. The validation step returns a descriptive error when the resource is missing.

Official References

• Genesys Cloud SCIM Groups API Documentation
• Genesys Cloud OAuth 2.0 Authentication Guide
• SCIM 2.0 Core Specification
• Genesys Cloud Rate Limiting and Retry Guidelines