1 files changed, 17 insertions, 0 deletions
diff --git a/matrix-specification/Data/UserId.php b/matrix-specification/Data/UserId.php
new file mode 100644
index 0000000..01a5e9e
--- /dev/null
+++ b/matrix-specification/Data/UserId.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Matrix\Data;
+
+class UserId
+{
+  public static function validate(): bool
+  {}
+
+  public static function parse(): array
+  {}
+
+  public static function build(string $username, string $serverName): string
+  {
+    return "@$username:$serverName";
+  }
+}