diff --git a/fido2-utils.sh b/fido2-utils.sh
index 6f9b1cd..29fa2fe 100644
--- a/fido2-utils.sh
+++ b/fido2-utils.sh
@@ -1,6 +1,15 @@
 #!/bin/sh
 DISK="/dev/nvme0n1p3"
 
+array_getNth() { 
+   shift "$(( $1 + 1 ))"; 
+   printf '%s\n' "$1"; 
+}
+
+array_length() { 
+   echo "$#"; 
+}
+
 fido2_device() {
     device=$(fido2-token -L | sed 's/:.*//')
     if [ -z "$device" ] ; then
@@ -10,9 +19,13 @@ fido2_device() {
     fi
 }
 
+fido2_get_token_users() {
+    token_id=$(cryptsetup luksDump "$1" | grep -E '^\s+[0-9]+: systemd-fido2$' | sed -e 's/\s\+\([0-9]\+\):.*/\1/')
+    echo "$token_id"
+}
+
 fido2_get_token() {
-    token_id=$(cryptsetup luksDump "$1" | grep -E '^\s+[0-9]+: systemd-fido2$' | head -1 | sed -e 's/\s\+\([0-9]\+\):.*/\1/')
-    cryptsetup token export "$1" --token-id=$token_id
+    cryptsetup token export "$1" --token-id=$2
 }
 
 fido2_is_pin_required() {
@@ -20,8 +33,8 @@ fido2_is_pin_required() {
     test "$pin_required" = "true"
 }
 
-fido2_authenticate() {
-    token_json=$(fido2_get_token "$2")
+fido2_pin_check() {
+    token_json=$(fido2_get_token "$2" "$3")
     param_file=$(mktemp)
     use_pin=$(echo $token_json | jq -r '."fido2-clientPin-required"')
     if [ "$use_pin" = "true" ] ; then
@@ -43,7 +56,25 @@ fido2_authenticate() {
         assert_flags="$assert_flags -t uv=$(echo $token_json | jq -r '."fido2-uv-required"')"
     fi
 
-    assertion=$(echo -n "$pin" | setsid fido2-assert $assert_flags -i "$param_file" $(fido2_device) 2> /dev/null || (rm -f $param_file ; echo "Wrong PIN." 1>&2 ; exit 1))
+    assertion=$(echo -n "$pin" | setsid fido2-assert $assert_flags -i "$param_file" $(fido2_device) 2> /dev/null || (rm -f $param_file ; printf '%s' "Wrong"))
     rm -f $param_file
     printf '%s' "$assertion" | tail -1
 }
+
+fido2_authenticate() {
+   positionFidoUsers=$(fido2_get_token_users "$2")
+   totalUsers=$(($(array_length $positionFidoUsers)-1))
+   authOk=""
+   for i in $(seq 0 $totalUsers)
+   do
+      result=$(fido2_pin_check $1 $2 "$(array_getNth $i $positionFidoUsers)")
+      if [ $totalUsers -ge 0 ] && [ "$result" != "Wrong" ]; then
+          authOk=$result
+      fi
+   done
+   if [ -z $authOk ]; then
+       printf '%s'  "Wrong PIN."
+   else
+       printf '%s'  "$authOk"
+   fi
+}