How to mock messagebird client in python

Question

I'm creating test in python, but I need to mock a messagebird client.

So, in the code, I'm creating a messagebird cliente then I call the message_create function, that is the function that I need to mock, like this:

client = messagebird.Client(settings.SMS_CLIENT_KEY)
client.message_create(
    sender,
    phone,
    template,
    {
        'reference': f'cId-{id}',
        'shortenUrls': True
    }
)

And then, in my mock I'm doing this:

from messagebird import Client

def mock_messagebird_client_message_create():
    with mock.patch.object(Client, 'message_create') as mocked_message_create:
        mocked_message_create.return_value = True
        yield mocked_message_create

But when I'm debugging apparently this doesn't work.

My question is, how can I mock a client from a external package, like the messagebird?