[Python] Python Token request different size

I'm trying to make an authentication code to an API using a token (OAuth2). The problem I have is that the API gives me a token of length 664, which is not valid and when I try to access the other API using that token, I get error 403. For some strange reason, when I make the call through Postman to get that token, it gives me a longer token and if I use that token that postman gives me in my code, I get access to the API without problems, it seems that for some reason my python code is truncating the token (?).

Here is my code:

def get_auth_token(url):
"""
get an auth token
"""
headers = {'Content-Type': 'application/x-www-form-urlencoded'}

data = {
'grant_type': 'client_credentials',
'username': "john.doe",
'password': "yuppy_duppy.*",
'audience': 'https://website-token.com',
'scope' : '',
'client_id' : 'foo-api-client',
'client_secret': 'bEeuADqpubMoPos6eLYd6UEMx'
}

try:
response = requests.post(url, headers=headers, data=data)
response.raise_for_status()
token = response.json()['access_token']
print(response.raw)
return token
except requests.exceptions.HTTPError as errh:
print(errh)
except requests.exceptions.ConnectionError as errc:
print(errc)
except requests.exceptions.Timeout as errt:
print(errt)
except requests.exceptions.RequestException as err:
print(err)

token = get_auth_token('https://url-to-request-token.com/token')
head = {'Authorization': "Bearer " + token}

request_result = requests.get(URL_ZOOM, headers=head)
print(request_result.status_code)


and the status code result:

>> 403


I validated the call request in Postman against my call parameters and they do not differ at all.

What could be the reason why Postman gives me a valid token and my request to the server gives me an invalid one?

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