hilgi on Login with app

Hi everyone,

i just started to code an app, which allows me to handle my channels and feeds with the thingspeak api.

creating channels and feeds isnt that hard, but i also need my user api key, i know i can get it from my profile, but i want my app to get it.

i looked up the code from

https://thingspeak.com/login

and tried to get all informations to login without original thingspeak site, i just got this:

https://thingspeak.com/users/sign_in&utf8=%E2%9C%93&authenticity_token=ejO5hG4yjznTIPqLMnRVUdVQZ1GunMusmCH5I9EJLtw=&user[login]=myemail%40adress.com&user[password]=mypassword&commit=Sign+In

if you see the source code of the login site, there is given the authenticity_token from the TS site

but always i try to login this way (by URL), it says "Sorry, that user cannot be found."

-i dont realy get why

-im not that approved in coding

-> plz can someone give me a hint to get this run?

greetings, hilgi