diff --git a/Sources/Services/Feishu/FeishuAuthService.swift b/Sources/Services/Feishu/FeishuAuthService.swift
index 8a6aa57..ff45cd4 100644
--- a/Sources/Services/Feishu/FeishuAuthService.swift
+++ b/Sources/Services/Feishu/FeishuAuthService.swift
@@ -42,19 +42,20 @@ final class FeishuAuthService {
     }
 
     func exchangeCode(_ code: String) async throws -> OAuthTokenData {
-        BuggerLog.info("Exchanging auth code (len=\(code.count)) for user token...")
+        BuggerLog.info("exchangeCode: start, code len=\(code.count)")
         let tenantToken = try await tenantAccessToken()
+        BuggerLog.info("exchangeCode: got tenant token, building request...")
         let url = URL(string: "\(baseURL)/authen/v1/oidc/access_token")!
         var request = URLRequest(url: url)
         request.httpMethod = "POST"
         request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
         request.setValue("Bearer \(tenantToken)", forHTTPHeaderField: "Authorization")
-        request.httpBody = try JSONEncoder().encode([
-            "grant_type": "authorization_code",
-            "code": code,
-        ] as [String: String])
+        BuggerLog.info("exchangeCode: encoding body...")
+        let body: [String: String] = ["grant_type": "authorization_code", "code": code]
+        request.httpBody = try JSONEncoder().encode(body)
+        BuggerLog.info("exchangeCode: body encoded (\(request.httpBody?.count ?? 0)B), sending...")
         let tokenData: OAuthTokenData = try await send(request)
-        BuggerLog.info("Got token: access=\(tokenData.accessToken.prefix(8))..., refresh=\(tokenData.refreshToken?.prefix(8) ?? "nil")..., expires=\(tokenData.expiresIn)")
+        BuggerLog.info("exchangeCode: got token access=\(tokenData.accessToken.prefix(8))... refresh=\(tokenData.refreshToken?.prefix(8) ?? "nil")...")
         return tokenData
     }