addDynamicTemplateData with nested array causes error

[Petah]

Issue Summary

Adding nest dynamic data to a personalisation doesn't work.

Steps to Reproduce

$personalization->addDynamicTemplateData([
    'user' => [
        'name' => 'test',
    ],
]);

Throws error:

E_NOTICE Array to string conversion

28 | /vendor/sendgrid/sendgrid/lib/helper/Assert.php | sprintf
54 | /vendor/sendgrid/sendgrid/lib/mail/Substitution.php | SendGrid\Helper\Assert::string
38 | /vendor/sendgrid/sendgrid/lib/mail/Substitution.php | SendGrid\Mail\Substitution::setKey
210 | /vendor/sendgrid/sendgrid/lib/mail/Personalization.php | SendGrid\Mail\Substitution::__construct
184 | /vendor/sendgrid/sendgrid/lib/mail/Personalization.php | SendGrid\Mail\Personalization::addSubstitution
163 | /classes/Helper/EmailComposer.php | SendGrid\Mail\Personalization::addDynamicTemplateData

Technical details:

• sendgrid-php version: 7.10
• php version: 7.4

[Petah]

NM, I figured it out:

$personalization->addDynamicTemplateData('user', [
    'foo' => [
        'bar' => 'test',
    ],
]);