laravel-enum: BadMethodCallException with numerical enum values

I have a UserTypeEnum with 2 values, Provider and Client. I had already created the database schema with tiny integers for this field so I wanted to set the values to be numerical.

I could not see an example in the documentation for this package but I saw an example of using numbers in the base enum package.

My class is below. When I call the request transformation function, it throws a BadMethodCallException which I think is because of the strict comparison between values. My form is a simple POST form which is submitting a string "1" which does not match the numerical 1 in the values array.

The error is as follows:

BadMethodCallException There's no value 1 defined for enum App\Enums\UserTypeEnum, consider adding it in the docblock definition.

Enum example:

/**
 * @method static self PROVIDER()
 * @method static self CLIENT()
 */
final class UserTypeEnum extends Enum
{
    protected static function values(): array
    {
        return [
            'PROVIDER' => 1,
            'CLIENT' => 2,
        ];
    }
}

This is how I am calling the transformEnums method.

$request->transformEnums($this->enumCastRules());

Below is the enum cast rules I am using.

private function enumCastRules()
{
    return [
        'type' => UserTypeEnum::class,
    ];
}

My form field:

<input type="radio" name="type" id="type_provider" value="{{ \App\Enums\UserTypeEnum::PROVIDER() }}">