Assuming you are using Firebase Authentication to handle user authentication, you can change a user's password in Angular and Firebase by following these steps:

Get a reference to the Firebase Authentication instance:

typescript
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import { AngularFireAuth } from '@angular/fire/auth';

constructor(private afAuth: AngularFireAuth) {}
Once the user clicks on the password reset link, they will be redirected to a page where they can enter their new password. In this page, you can use the confirmPasswordReset method to confirm that the password reset was successful:

javascript
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const code = // Get the code from the URL query parameters
const newPassword = // Get the new password from the user input

this.afAuth.confirmPasswordReset(code, newPassword)
  .then(() => {
    console.log('Password reset successful');
  })
  .catch((error) => {
    console.log(`Error resetting password: ${error}`);
  });
If the password reset was successful, you can update the user's password by calling the updatePassword method on the user object:

const user = // Get the current user from the AngularFireAuth instance

user.updatePassword(newPassword)
  .then(() => {
    console.log('Password updated successfully');
  })
  .catch((error) => {
    console.log(`Error updating password: ${error}`);
  });
Note that the updatePassword method can only be called on a signed-in user. Therefore, you should make sure the user is signed in before calling this method.