diff --git a/docker-compose.yml b/docker-compose.yml
index adf4084..ec3c195 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -69,10 +69,12 @@ services:
       SMTP_PASSWORD: BBdgb6KxRQ8mNcpWFJsZCJxbSGNdgLhKFiITMErfBlQP
       LOGIN_THEME: ecosplay
       ECOSPLAY_GROUPS: "gp_asso gp_contest gp_mail gp_mailling gp_member gp_ndd gp_sign gp_ticket super_admin_asso superadmin"
-      ADMIN_USER_USERNAME: jovann@siteconseil.fr
+      ADMIN_USER_USERNAME: jovann@e-cosplay.fr
       ADMIN_USER_PASSWORD: Shoko1997@
       ADMIN_USER_FIRSTNAME: Jovann
       ADMIN_USER_LASTNAME: Serreau
+      SYNC_BOT_CLIENT: sync-bot
+      SYNC_BOT_SECRET: dev-sync-bot-9f3b2a7c1e8d4f6a0b5c2e1d7f8a4b3c
     volumes:
       - ./init/sync.sh:/opt/init/sync.sh:ro
     entrypoint: ["/bin/bash", "/opt/init/sync.sh"]
diff --git a/init/sync.sh b/init/sync.sh
index ee6e4d9..c276fd1 100755
--- a/init/sync.sh
+++ b/init/sync.sh
@@ -16,6 +16,7 @@
 #   ECOSPLAY_GROUPS  (space-separated list)
 #   ADMIN_USER_USERNAME, ADMIN_USER_PASSWORD,
 #   ADMIN_USER_FIRSTNAME, ADMIN_USER_LASTNAME
+#   SYNC_BOT_CLIENT, SYNC_BOT_SECRET
 # =============================================================
 
 set -euo pipefail
@@ -29,16 +30,44 @@ warn() { printf '   \033[1;33m! %s\033[0m\n' "$*"; }
 # -------------------------------------------------------------
 # Wait for Keycloak and authenticate
 # -------------------------------------------------------------
-log "Waiting for Keycloak at ${KC_SERVER}"
-until $KC config credentials \
+# Two authentication paths:
+#   1. sync-bot service account (preferred, used after bootstrap).
+#   2. Default bootstrap admin (used on first run, before sync-bot
+#      has been created and granted the admin role).
+# -------------------------------------------------------------
+KC_LOGIN_MODE=none
+
+login_as_sync_bot() {
+    [ -n "${SYNC_BOT_SECRET:-}" ] || return 1
+    $KC config credentials \
+        --server "$KC_SERVER" \
+        --realm master \
+        --client "$SYNC_BOT_CLIENT" \
+        --secret "$SYNC_BOT_SECRET" >/dev/null 2>&1
+}
+
+login_as_admin() {
+    $KC config credentials \
         --server "$KC_SERVER" \
         --realm master \
         --user "$KC_ADMIN" \
-        --password "$KC_ADMIN_PASSWORD" >/dev/null 2>&1; do
-    info "not ready yet, retrying in 5s..."
+        --password "$KC_ADMIN_PASSWORD" >/dev/null 2>&1
+}
+
+log "Authenticating to Keycloak at ${KC_SERVER}"
+while true; do
+    if login_as_sync_bot; then
+        KC_LOGIN_MODE=sync-bot
+        break
+    fi
+    if login_as_admin; then
+        KC_LOGIN_MODE=bootstrap
+        break
+    fi
+    info "Keycloak not ready / no valid credentials yet, retrying in 5s..."
     sleep 5
 done
-info "Keycloak ready."
+info "Authenticated (mode=$KC_LOGIN_MODE)"
 
 # -------------------------------------------------------------
 # Helpers
@@ -171,6 +200,72 @@ ensure_client() {
     info "+ client $2 ($1)"
 }
 
+ensure_sync_bot() {
+    # Create (or keep in sync) the automation service client in master.
+    # Grants its service account the master 'admin' realm role so that
+    # sync.sh can authenticate with client_credentials after the default
+    # admin user is disabled.
+    local cid
+    cid=$(client_internal_id master "$SYNC_BOT_CLIENT")
+    if [ -z "$cid" ]; then
+        $KC create clients -r master \
+            -s "clientId=$SYNC_BOT_CLIENT" \
+            -s "name=Sync Bot" \
+            -s "description=Service account used by init/sync.sh for unattended config reconciliation" \
+            -s 'protocol=openid-connect' \
+            -s 'enabled=true' \
+            -s 'publicClient=false' \
+            -s "secret=$SYNC_BOT_SECRET" \
+            -s 'standardFlowEnabled=false' \
+            -s 'implicitFlowEnabled=false' \
+            -s 'directAccessGrantsEnabled=false' \
+            -s 'serviceAccountsEnabled=true' >/dev/null
+        cid=$(client_internal_id master "$SYNC_BOT_CLIENT")
+        info "+ service client $SYNC_BOT_CLIENT (master)"
+    else
+        $KC update "clients/$cid" -r master \
+            -s 'enabled=true' \
+            -s 'serviceAccountsEnabled=true' \
+            -s 'standardFlowEnabled=false' \
+            -s 'directAccessGrantsEnabled=false' \
+            -s "secret=$SYNC_BOT_SECRET" >/dev/null
+        info "= service client $SYNC_BOT_CLIENT (master)"
+    fi
+    # Grant 'admin' realm role to the auto-generated service account user
+    $KC add-roles -r master \
+        --uusername "service-account-${SYNC_BOT_CLIENT}" \
+        --rolename admin >/dev/null 2>&1 || true
+    info "  service-account-${SYNC_BOT_CLIENT} -> realm role admin"
+}
+
+disable_default_admin() {
+    # Only disable once we're sure sync-bot can authenticate (otherwise
+    # next run would be locked out).
+    if ! login_as_sync_bot; then
+        warn "sync-bot auth not working, refusing to disable default admin"
+        login_as_admin >/dev/null 2>&1 || true
+        return
+    fi
+    # Re-login as admin to perform the disable action (sync-bot's token
+    # was used only for verification)
+    login_as_admin >/dev/null 2>&1 || true
+
+    local admin_id current
+    admin_id=$(user_id master "$KC_ADMIN")
+    if [ -z "$admin_id" ]; then
+        info "no '$KC_ADMIN' user in master, nothing to disable"
+        return
+    fi
+    current=$($KC get "users/$admin_id" -r master --fields enabled 2>/dev/null \
+        | sed -n 's/.*"enabled"[ ]*:[ ]*\(true\|false\).*/\1/p' | head -n1)
+    if [ "$current" = "false" ]; then
+        info "= default admin user '$KC_ADMIN' already disabled"
+        return
+    fi
+    $KC update "users/$admin_id" -r master -s enabled=false >/dev/null
+    info "+ default admin user '$KC_ADMIN' disabled"
+}
+
 # =============================================================
 # Master realm: SMTP, theme, locale
 # =============================================================
@@ -191,6 +286,12 @@ $KC update realms/master \
     -s "defaultLocale=fr"
 info "master realm updated"
 
+# =============================================================
+# Master realm: automation service account (sync-bot)
+# =============================================================
+log "Ensuring sync-bot service client in master realm"
+ensure_sync_bot
+
 # =============================================================
 # Master realm: global Keycloak admin user
 # =============================================================
@@ -236,4 +337,10 @@ else
     warn "ecosplay realm not found — will be imported on next boot"
 fi
 
+# =============================================================
+# Disable default bootstrap admin (only after sync-bot is proven)
+# =============================================================
+log "Disabling default bootstrap admin user"
+disable_default_admin
+
 log "Sync complete"
diff --git a/realms/ecosplay-realm.json b/realms/ecosplay-realm.json
index e324601..548d20b 100644
--- a/realms/ecosplay-realm.json
+++ b/realms/ecosplay-realm.json
@@ -69,8 +69,8 @@
 
   "users": [
     {
-      "username": "jovann@siteconseil.fr",
-      "email": "jovann@siteconseil.fr",
+      "username": "jovann@e-cosplay.fr",
+      "email": "jovann@e-cosplay.fr",
       "firstName": "Jovann",
       "lastName": "Serreau",
       "enabled": true,