I'm new to flutter and trying to implement sign-up authentication in flutter using Firebase. But the problem is that when i learned about authentication, they provided a post method url which must accept API-KEY in it. Now, i dont know where does my API-KEY exists.
http.post(https://www.googleapis.com/identitytoolkit/v3/relyingparty/signupNewUser?key=[API-KEY]');
You'll find it in Project Settings under the General tab.
If you add a web app, it's also the first parameter in the config.