diff --git a/README.delete-user b/README.delete-user
index 8347a6b..b277246 100644
--- a/README.delete-user
+++ b/README.delete-user
@@ -61,10 +61,27 @@ usr_to_delete="
 "
 
 clear
+
+# Log in to an instance and store credentials.
+#
+# instance url:   https://mm-irights.oopen.de
+# server name:    local-server
+# username:       admin-irights
+# password:       M6aHdhGh_I%9
+
+# save password to a file
+#
+cat << EOF > .mm-admin-irights.auth
+M6aHdhGh_I%9
+EOF
+
+mmctl auth login https://mm-irights.oopen.de --name local-server --username admin-irights --password-file .mm-admin-irights.auth
+
 echo ""
 for _user in $usr_to_delete ; do
    echo ""
    echo $_user
+
    if $(mmctl user list 2> /dev/null | grep -q $_user) ; then
       echo -n "   Delete user '$_user' [yes/no]: "
       read OK
@@ -94,6 +111,9 @@ for _user in $usr_to_delete ; do
    fi
 done
 
+rm .mm-admin-irights.auth
+
+
 # Set "EnableAPIUserDeletion" to "false" in file /opt/mattermost/config/config.json
 #
 perl -i -n -p -e "s/^(\s*\"EnableAPIUserDeletion\":).*$/\1 false,/" /opt/mattermost/config/config.json