交友身份，一次驗證

// 1. User authorizes via OAuth
const authUrl = "https://xoxo.space/oauth/authorize"
  + "?client_id=your_client_id"
  + "&redirect_uri=https://yourapp.com/callback"
  + "&scope=identity,connections,reputation,"
  + "social_signals,profile,newsfeed"
  + "&state=random123"
  + "&response_type=code";

// 2. Exchange code for token
const token = await fetch(
  "https://protocol.xoxo.space/protocol/v1/auth/token",
  {
    method: "POST",
    headers: {
      "X-API-Key": "your-api-key",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      grant_type: "authorization_code",
      code: authCode,
      client_id: "your_client_id",
      client_secret: "your_secret",
      redirect_uri: "https://yourapp.com/callback",
    }),
  }
);

// 3. Search compatible connections
const matches = await fetch(
  "https://protocol.xoxo.space/protocol/v1/connections/search",
  {
    headers: {
      "X-API-Key": "your-api-key",
      Authorization: `Bearer ${token.access_token}`,
    },
  }
);

// 4. Browse a connection's newsfeed
const feed = await fetch(
  `https://protocol.xoxo.space/protocol/v1/connections/${tmpId}/newsfeed`,
  {
    headers: {
      "X-API-Key": "your-api-key",
      Authorization: `Bearer ${token.access_token}`,
    },
  }
);