private void login() {
        email = edtEmail.getText().toString().trim();
        password = edtPassword.getText().toString().trim();

        /*
        Check for empty fields to avoid exception
         */
        if(TextUtils.isEmpty(email)){
            Toast.makeText(this, "Enter email", Toast.LENGTH_LONG).show();
            return;
        }
        if(TextUtils.isEmpty(password)){
            Toast.makeText(this, "Enter password", Toast.LENGTH_LONG).show();
            return;
        }
        auth.signInWithEmailAndPassword(email, password)
                .addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if(task.isSuccessful()){
                            user = auth.getCurrentUser();
                            Toast.makeText(LoginActivity.this, "Login successful", Toast.LENGTH_LONG).show();
                            startActivity(new Intent(LoginActivity.this, MainActivity.class));
                            finish();
                        }
                        else{
                            Toast.makeText(LoginActivity.this, "Login unsuccessful. Check details", Toast.LENGTH_LONG).show();
                        }
                    }
                });
    }