Can a session token be generated in pure HTTP?

Hi All

I want to simplify a few things for the coders and avoid headers. Can we create session tokens like this?

http://xxx.xxx.xx.xxx/api/v2/user/session?method=get&api_key=4d18fd67a5d1ffce16dxxxxxxxxxxxxxxxxx&email=user@myemail.com&password=user123&duration=20&accept=json

If so, why does the above not work? And also if so, can everything be done using only http?

Many thanks for all your help on this forum, it is great.

Charlie