feat: Update agent authentication and add new user auth client

Author: dheerajoruganty

agents/.env.user

@@ -0,0 +1,40 @@
+# =============================================================================
+# MCP Gateway Registry - Environment Configuration Sample  
+# =============================================================================
+
+# =============================================================================
+# REGISTRY CONFIGURATION
+# =============================================================================
+REGISTRY_URL=http://127.0.0.1:7860
+ADMIN_USER=admin
+ADMIN_PASSWORD=your-secure-password
+
+# =============================================================================
+# AUTH SERVER CONFIGURATION
+# =============================================================================
+AUTH_SERVER_URL=http://auth-server:8888
+
+# =============================================================================
+# AWS COGNITO OAUTH2 CONFIGURATION
+# =============================================================================
+COGNITO_CLIENT_ID=72rfl6a7dmre8ocvc7neg0hndj
+COGNITO_CLIENT_SECRET=153apb563buo05k3723e41scun0r3hkqqoeupbbhmk76930ikr7d
+COGNITO_USER_POOL_ID=us-east-1_acYPwjBa3
+AWS_REGION=us-east-1
+
+# Optional: Only set this if you have a CUSTOM Cognito domain
+# COGNITO_DOMAIN=auth.mycompany.com
+
+# =============================================================================
+# OPTIONAL OAUTH2 PROVIDERS
+# =============================================================================
+# GITHUB_CLIENT_ID=your-github-oauth-app-client-id
+# GITHUB_CLIENT_SECRET=your-github-oauth-app-client-secret
+# GOOGLE_CLIENT_ID=your-google-oauth-client-id.googleusercontent.com
+# GOOGLE_CLIENT_SECRET=your-google-oauth-client-secretSECRET_KEY=b952b0b694f5c975661ccc4032d915fad1173a68e56395bdacab27f7e656b9ae
+
+SECRET_KEY=1234
+
+
+GITHUB_CLIENT_ID=Ov23li3f4QV9sufLFXsP
+GITHUB_CLIENT_SECRET=29f27de7079fd1dfdcfa8047f5e2f19de2e48bf8