diff --git a/data/apps/helpers.d/user b/data/apps/helpers.d/user
new file mode 100644
index 000000000..de9a2cbce
--- /dev/null
+++ b/data/apps/helpers.d/user
@@ -0,0 +1,5 @@
+
+# Check if a user exists
+ynh_user_exists() {
+    sudo yunohost user list --json | grep -q "\"username\": \"${1}\""
+}
\ No newline at end of file