document more features

docs/source/v2/tenant-manager.blade.md

@@ -28,7 +28,6 @@ To call methods on `TenantManager`, you may use the `tenancy()` helper or the `T
 
 ### Find tenant by domain
 
-
 ```php
 >>> tenancy()->findByDomain('bar.localhost')
 => Stancl\Tenancy\Tenant {#3091
@@ -41,6 +40,14 @@ To call methods on `TenantManager`, you may use the `tenancy()` helper or the `T
    }
 ```
 
+### Find tenant by arbitrary key
+
+> Note: Only the DB storage driver implements this feature.
+```php
+tenancy()->findBy('email', $email);
+tenancy()->findByEmail($email);
+```
+
 ### Getting the current tenant
 
 One more way to get the current [tenant]({{ $page->link('tenants') }}) is to call `getTenant()` on `TenantManager`:

docs/source/v2/tenant-storage.blade.md

@@ -46,4 +46,10 @@ Note that $key has to be a string or an array with string keys. The value(s) can
      "a" => "b",
      "c" => "d",
    ]
-```
+```
+
+To delete keys from the storage, you may use these methods:
+```php
+$tenant->deleteKey($key)
+$tenant->deleteKeys(['foo', 'bar']);
+```