Auth

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"
    }
  ]
}