feat: add method to generate users' initials

src/Entity/User.php

@@ -134,6 +134,13 @@ class User implements UserInterface, TimestampableEntityInterface
         return sprintf('%s %s', $this->getFirstName(), $this->getLastName());
     }
 
+    public function getInitials(): string
+    {
+        $token = substr($this->getFirstName(), 0, 1).substr($this->getLastName(), 0, 2);
+
+        return strtoupper($token);
+    }
+
     public function getEmail(): ?string
     {
         return $this->email;