The 400 error indicates a bad request, meaning there's an issue with the data being sent to the server. Here's how you can debug and resolve it:
1.Check the API Key and see if is same as in your Firebase console under Project Settings > General > Web API Key
2.Verify that the email, password, and returnSecureToken fields are being sent correctly. Log the payload before making the HTTP request: console.log({ email, password, returnSecureToken: true });
3.Check if your Firebase project is set up to allow email/password authentication. Go to Firebase Console > Authentication > Sign-in Method. Enable “Email/Password”.
4.Inspect Server’s response by logging it to console : catchError((error: HttpErrorResponse) => {
5.Use browser dev tools (Network tab) to inspect the actual request being sent. Ensure the request body matches Firebase’s Api requirements.
6.Use Curl command and check if it is also returning the same response. curl -X POST
-H "Authorization: Bearer YOUR_API_KEY"
-H "Content-Type: application/json"
https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?key=YOUR_API_KEY
-d '{
"email": "[email protected]",
"password": "your_password"
}'