Update Client.php

[TParis]

Thanks for your pull request!

Before we consider merging it, please take the time to ensure you are complying with these guidelines:

• [ x] I have described my changes in the CHANGELOG
• [ x] I have adopted the coding style
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• [ x] I have added consistent PHPDoc documentation to symbols I added
• [ x] I have fixed an issue and I added unit test case(s)
• [x ] I have added a feature and I added functional test case(s)
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[GenieTim]

I would appreciate these changes as well in order to restrict the tenant. Would you mind merging them, @krizalys, please? Thanks.