API key validation and user profile
POST /users/validate-key Authorization: Bearer ek_your_key_here
{ "valid": true, "user_id": "usr_abc123", "email": "developer@example.com" }
{ "valid": false, "error": "Key not found or revoked" }
GET /users/profile Authorization: Bearer ek_your_key_here
{ "id": "usr_abc123", "email": "developer@example.com", "name": "Developer A", "created_at": "2026-01-01T00:00:00Z", "workspaces": [ { "id": "ws_xyz", "slug": "my-startup", "name": "My Startup", "role": "owner" } ] }