SSL Certificate Verify Failure Error when sending an email using Python - python-3.x

Question

I am trying to develop a python script to send an email using a GMail account and seem to be encountering an SSL Certificate issue. I have enabled the option to let less secure apps access my gmail account. Could anyone please help me to identify what I am doing wrong as I am getting this error:
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:997) - Detailed stack trace is below.
import smtplib, ssl
class Mail:
def __init__(self):
self.port = 465
self.smtp_server_domain_name = "smtp.gmail.com"
self.sender_mail = "some.email#gmail.com"
self.password = "Password#123"
def send(self, emails, subject, content):
ssl_context = ssl.create_default_context()
service = smtplib.SMTP_SSL(self.smtp_server_domain_name, self.port, context=ssl_context)
service.login(self.sender_mail, self.password)
for email in emails:
result = service.sendmail(self.sender_mail, email, f"Subject: {subject}\n{content}")
service.quit()
if __name__ == '__main__':
mails = input("Enter emails: ").split()
subject = input("Enter subject: ")
content = input("Enter content: ")
mail = Mail()
mail.send(mails, subject, content)
Stacktrace is below:
Traceback (most recent call last):
File "/Users/prashanth/PycharmProjects/pythonTools/Mail.py", line 29, in <module>
mail.send(mails, subject, content)
File "/Users/prashanth/PycharmProjects/pythonTools/Mail.py", line 14, in send
service = smtplib.SMTP_SSL(self.smtp_server_domain_name, self.port, context=ssl_context)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 1050, in __init__
SMTP.__init__(self, host, port, local_hostname, timeout,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 255, in __init__
(code, msg) = self.connect(host, port)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 341, in connect
self.sock = self._get_socket(host, port, self.timeout)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/smtplib.py", line 1057, in _get_socket
new_socket = self.context.wrap_socket(new_socket,
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ssl.py", line 512, in wrap_socket
return self.sslsocket_class._create(
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ssl.py", line 1070, in _create
self.do_handshake()
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ssl.py", line 1341, in do_handshake
self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:997)
Process finished with exit code 1
My Environment:
MacOS Big Sur 11.6.5
Python : 3.10