Prevent email truncating by increasing size of username column in users table.

docs/install.md

@@ -52,6 +52,7 @@ Therefore, you can add `first_name`, `last_name`, and `avatar` columns to table
 ```console
 php spark migrate -n Datamweb\ShieldOAuth
 ```
+The default size of the `username` field created by Shield is **30** characters. Since Oauth uses the `username` field for the user's email address, this often is not large enough. Consider increasing the size of this field to `VARCHAR(256)`. _The migrations make this change for you_.
 
 > **Note**
 > By default, `Shield OAuth` uses columns named `first_name`, `last_name`, and `avatar`.

src/Database/Migrations/2022-10-20-182737_ShieldOAuth.php

@@ -50,10 +50,19 @@ public function up(): void
                 'type'       => 'VARCHAR',
                 'constraint' => '1000',
                 'null'       => true,
-            ],
+            ]
         ];
 
         $this->forge->addColumn('users', $fields);
+
+        $fields2 = [
+            'username'     => [
+                'type'     => 'VARCHAR(256)',
+                'null'     => true
+            ]
+        ];
+
+        $this->forge->modifyColumn('users', $fields2);
     }
 
     public function down(): void

src/Libraries/GoogleOAuth.php

@@ -96,7 +96,7 @@ protected function setColumnsName(string $nameOfProcess, $userInfo): array
     {
         if ($nameOfProcess === 'syncingUserInfo') {
             return [
-                $this->config->usersColumnsName['first_name'] => $userInfo->name,
+                $this->config->usersColumnsName['first_name'] => $userInfo->given_name,
                 $this->config->usersColumnsName['last_name']  => $userInfo->family_name ?? null,
                 $this->config->usersColumnsName['avatar']     => $userInfo->picture,
             ];