Python Requests syntax for getting a resource token.

Situation

I have been able to access the api's via Postman. However, when using the Requests package, I am getting a 403 error. I suspect my syntax is incorrect.

Code Used

# Get an access token

token_url = pu +ot

token data= {   

"grant_type": "password",   

"username": saak,   

"password":sask

}   


header={"Content-Type":"application/json"}

token_response = requests.get(token_url, headers=header, json=token_data)