diff --git a/custom-pg_hba.conf b/custom-pg_hba.conf
index 3fe8084..07b9648 100644
--- a/custom-pg_hba.conf
+++ b/custom-pg_hba.conf
@@ -87,15 +87,14 @@ local   all             postgres                                peer
 # TYPE  DATABASE        USER            ADDRESS                 METHOD
 
 # "local" is for Unix domain socket connections only
-# md5認証に変更してpeer認証エラーを回避
-local   all             all                                     md5
+local   all             all                                     peer
 # IPv4 local connections:
 host    all             all             127.0.0.1/32            md5
 # IPv6 local connections:
 host    all             all             ::1/128                 md5
 # Allow replication connections from localhost, by a user with the
 # replication privilege.
-local   replication     all                                     md5
+local   replication     all                                     peer
 host    replication     all             127.0.0.1/32            md5
 host    replication     all             ::1/128                 md5
 host    all             all             172.0.0.0/8               md5
diff --git a/rog/views_apis/api_edit.py b/rog/views_apis/api_edit.py
index a74298a..fe0a939 100755
--- a/rog/views_apis/api_edit.py
+++ b/rog/views_apis/api_edit.py
@@ -9,6 +9,7 @@ from rog.models import Location2025, NewEvent2, Entry, GpsLog
 import logging
 import uuid
 import os
+import json
 from django.db.models import F, Q
 from django.db import transaction
 from django.conf import settings
@@ -1087,11 +1088,32 @@ def get_checkin_list(request):
     """
     logger.info("get_checkin_list called")
     
-    # リクエストからパラメータを取得
-    zekken_number = request.query_params.get('zekken')
-    event_code = request.query_params.get('event')
+    # リクエストからパラメータを取得（GET/POSTの両方に対応）
+    if request.method == 'GET':
+        zekken_number = request.GET.get('zekken')
+        event_code = request.GET.get('event')
+    else:  # POST
+        try:
+            data = json.loads(request.body)
+            zekken_number = data.get('zekken')
+            event_code = data.get('event')
+        except:
+            data = request.POST
+            zekken_number = data.get('zekken')
+            event_code = data.get('event')
     
-    logger.debug(f"Parameters: zekken={zekken_number}, event={event_code}")
+    logger.info(f"[GET_CHECKIN_LIST] Request method: {request.method}")
+    logger.info(f"[GET_CHECKIN_LIST] Parameters received - zekken: {zekken_number}, event: {event_code}")
+    logger.info(f"[GET_CHECKIN_LIST] Full GET params: {dict(request.GET.items())}")
+    logger.info(f"[GET_CHECKIN_LIST] Full POST params: {dict(request.POST.items()) if request.method == 'POST' else 'N/A'}")
+    
+    # POSTの場合のリクエストボディも確認
+    if request.method == 'POST':
+        try:
+            body_content = request.body.decode('utf-8')
+            logger.info(f"[GET_CHECKIN_LIST] Request body: {body_content}")
+        except:
+            logger.info(f"[GET_CHECKIN_LIST] Could not decode request body")
     
     # パラメータ検証
     if not all([zekken_number, event_code]):