[Python] Write CSV file with data in new row in python

I using python locust to do load test and my questions is i try to write csv file with email address as new row but it is separated the email charaters with ',' with each chracter like below:

z,b,r,X,S,F,i,E,p,H,1,@,g,m,a,i,l,.,c,o,m
I,q,O,2,i,t,a,Q,w,m,2,@,g,m,a,i,l,.,c,o,m
5,w,J,b,1,v,Y,X,f,H,3,@,g,m,a,i,l,.,c,o,m
G,J,S,y,I,Y,S,S,9,e,4,@,g,m,a,i,l,.,c,o,m
L,M,8,R,B,a,p,g,I,0,5,@,g,m,a,i,l,.,c,o,m


How to make it like LM8RBapgI05@gmail.com?

My code as below:

@task
def register(self):
email: str
telcoCode: int
phone: int

self.client.request_name = "API Register User"
with open("email.csv", "w", newline="") as csvfile:
for x in range(5):
email = ''.join(random.choices(string.ascii_letters + string.digits, k=10)) + str(
x + 1) + "@gmail.com"
telcocode = random.randint(10, 19)
phone = random.randint(10000000, 99999999)
phonestr = "+60" + str(telcocode) + str(phone)

csvwriter = csv.writer(csvfile)
csvwriter.writerow(email)
self.client.headers = {
"x-api-key": "KZThJSCH1vWj5snaeQQ+TQ5rTbucayxXtDVHFmfRSJag5gLkUKOMgrpitL1jHIVr6bYAN5N9NrKWg6RhdgNThQ=="}
response = self.client.post("https://",
{"email": email, "phone": phonestr,
"password": "abcd1234", "password_confirmation": "abcd1234"}
)
assert response.status_code == 200, "Failed to register, status code: " + str(response.status_code)
logging.info(response.text)


Please help. Thanks in advance.

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