[RDP Authentication Inquiry] refresh_token Not Working Properly

Hi, I am using Python to issue and use an RDP Authentication Token.

However, during my testing, I found that when I send a request with grant_type='refresh_token', the same access_token and refresh_token are returned in the response as those sent in the request. As a result, even when I send a request with grant_type='refresh_token', the tokens expire after 5 minutes.

Below is the code from my testing. I attempted refreshing every minute, but as you can see from the logs, the same access_token and refresh_token are continuously returned. Eventually, after 5 minutes—or sometimes even earlier—I receive a 400 error. Could this be due to a contractual limitation or restriction on the use of the refresh_token?

refresh_interval = 60
auth_url = "https://api.refinitiv.com:443/auth/oauth2/v1/token"

data = {
    'username': username, 
    'password': password,
    'grant_type': 'password',
    'takeExclusiveSignOnControl': 'true',
    'scope': 'trapi'}

response = requests.post(auth_url,
                         headers={'Accept': 'application/json'},
                         data=data,
                         auth=(client_id, ''),
                         verify=True,
                         allow_redirects=False)
response.raise_for_status()
auth_response = response.json()

print("[create_token] Refinitiv Data Platform Authentication succeeded. RECEIVED:")
print(json.dumps(auth_response, sort_keys=True, indent=2, separators=(',', ':')))

refinitiv_token_info = {
    "access_token": auth_response["access_token"],
    "refresh_token": auth_response["refresh_token"],
    "expired_time": time.time() + refresh_interval
}

print(f"[create_token] Token created successfully.")
print(json.dumps(refinitiv_token_info, sort_keys=True, indent=2, separators=(',', ':')))

token_for_refresh = refinitiv_token_info["refresh_token"]

while 1:
    data = {'refresh_token': token_for_refresh,
            'grant_type': 'refresh_token'}
    
    print("[refresh_token] Sending authentication request with refresh token to", auth_url, "...")
    print(f"[refresh_token] post data: {data}")
    
    response = requests.post(auth_url,
                             headers={'Accept': 'application/json'},
                             data=data,
                             auth=(client_id, '')
                            )
    response.raise_for_status()
    auth_response = response.json()
    
    print("[refresh_token] Refinitiv Data Platform Authentication succeeded. RECEIVED:")
    print(json.dumps(data, sort_keys=True, indent=2, separators=(',', ':')))
    
    refinitiv_token_info = {
        "access_token": auth_response['access_token'],
        "refresh_token": auth_response['refresh_token'],
        "expired_time": time.time() + refresh_interval
    }
    print(f"[refresh_token] Token created successfully.")
    print(json.dumps(refinitiv_token_info, sort_keys=True, indent=2, separators=(',', ':')))
    
    token_for_refresh = refinitiv_token_info["refresh_token"]
    print('-'*150)
    time.sleep(60)