Your rather ubrupt query could generate a bit of animosity, but I'll give you the benefit of the doubt, maybe, thinking that english isn't your first language. When you're from the midwest you need a paragraph to say "hello" or begin the 5-paragraph theses of our inculcation. I don't think you're from Chicago, nor Oxford, nor Berlin. (Germans know english better than we do.)

You proved that you had done nothing to research this, so now you've read a paragraph. The namespace for "rest" and "client" is a trafficked one. Do you mean REST::Client? cpan