validationError: 1 validation error for EmailContact email when trying .bcc -> Input should be a valid string

[iorobertob]

Describe the bug
When running with the example bcc provided in the documenation:

email = (EmailBuilder()
        .from_email(mail_from, name_from)
        .to_many([{"email":borrower_email, "name":borrower_name}])
        .bcc([
            {"email": "bcc1@example.com", "name": "BCC User 1"},
            {"email": "bcc2@example.com"}
         ])
        .subject(subject)
        .html(html_content)
        .text(plain_text_content)
        .build())

response = ms.emails.send(email)

An error is thrown because of the .bcc section, no matter how i format it, with variables or directly pasting the example given it always fails to this:

INFO:werkzeug:127.0.0.1 - - [03/Nov/2025 09:08:58] "POST /book/1 HTTP/1.1" 500 -
Traceback (most recent call last):
  File ".../venv/lib/python3.12/site-packages/flask/app.py", line 1536, in __call__
    return self.wsgi_app(environ, start_response)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../venv/lib/python3.12/site-packages/werkzeug/middleware/proxy_fix.py", line 183, in __call__
    return self.app(environ, start_response)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../venv/lib/python3.12/site-packages/flask/app.py", line 1514, in wsgi_app
    response = self.handle_exception(e)
               ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/.../venv/lib/python3.12/site-packages/flask/app.py", line 1511, in wsgi_app
    response = self.full_dispatch_request()
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../venv/lib/python3.12/site-packages/flask/app.py", line 919, in full_dispatch_request
    rv = self.handle_user_exception(e)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../venv/lib/python3.12/site-packages/flask/app.py", line 917, in full_dispatch_request
    rv = self.dispatch_request()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File ".../venv/lib/python3.12/site-packages/flask/app.py", line 902, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../main.py", line 341, in book_item
    response = send_email(  borrower_email= borrower_contact,
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../main.py", line 820, in send_email
    .bcc([
     ^^^^^
  File ".../venv/lib/python3.12/site-packages/mailersend/builders/email.py", line 154, in bcc
    self._bcc.append(EmailContact(email=email, name=name))
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../venv/lib/python3.12/site-packages/pydantic/main.py", line 250, in __init__
    validated_self = self.__pydantic_validator__.validate_python(data, self_instance=self)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for EmailContact
email
  Input should be a valid string [type=string_type, input_value=[{'email': 'bcc1@example....l': 'bcc2@example.com'}], input_type=list]
    For further information visit https://errors.pydantic.dev/2.12/v/string_type

To Reproduce
Steps to reproduce the behavior:

1. Create Python venv 3.12 and activate it
2. Install mailersend 2.0.0 from pip
3. Run the sample code in a script
4. Get the returned error message

Expected behavior
No exception thrown

Environment (please complete the following information):

• OS: macOS Tahoe 26
• Python version 3.12
• SDK version 2.0.0

Additional context
Add any other context about the problem here.