Add user invitation facilities RSM-5

Adds user invitation to teams, and framework for assigning taems
Also adds user acc. deletion.

app/Traits/HandlesAccountTokens.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Traits;
+
+use Illuminate\Support\Facades\Hash;
+
+trait HandlesAccountTokens
+{
+
+
+    public function generateAccountTokens()
+    {
+        $deleteToken = bin2hex(openssl_random_pseudo_bytes(32));
+        $cancelToken = bin2hex(openssl_random_pseudo_bytes(32));
+
+        $tokens = [
+
+            'delete' => Hash::make($deleteToken),
+            'cancel' => Hash::make($cancelToken)
+
+        ];
+
+        $this->account_tokens = json_encode($tokens);
+        $this->save();
+
+        return [
+
+            'delete' => $deleteToken,
+            'cancel' => $cancelToken
+        ];
+
+    }
+
+    public function verifyAccountToken(string $token, string $type): bool
+    {
+        $tokens = json_decode($this->account_tokens);
+
+        if ($type == 'deleteToken')
+        {
+            return Hash::check($token, $tokens->delete);
+        }
+        elseif ($type == 'cancelToken')
+        {
+            return Hash::check($token, $tokens->cancel);
+        }     
+
+        return false;
+    }   
+
+
+}