private void signIn() {

    String UserEmail = mEditUsername.getText().toString().trim();
    String UserPassword = mEditPassword.getText().toString().trim();

    if (TextUtils.isEmpty(UserEmail)) {
        Toast.makeText(this, "Please enter your username", Toast.LENGTH_SHORT).show();
        return;
    }
    if (TextUtils.isEmpty(UserPassword)) {
        Toast.makeText(this, "Please enter your password", Toast.LENGTH_SHORT).show();
        return;
    }
    mSignInPDialog = new ProgressDialog(LogInActivity.this);
    setupPDialog(mSignInPDialog,"Loading...","Logging in");

    mFirebaseAuth.signInWithEmailAndPassword(UserEmail, UserPassword)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        setLoggedIn("True");
                        mSignInPDialog.dismiss();
                        startActivity(new Intent(LogInActivity.this, MainActivity.class));
                        Toast.makeText(LogInActivity.this, "Logged in succesfully!", Toast.LENGTH_SHORT).show();
                        finish();
                    } else {
                        FirebaseException e = (FirebaseException) task.getException();
                        mSignInPDialog.dismiss();
                        Toast.makeText(LogInActivity.this, "LogIn failed: " + e.getMessage(), Toast.LENGTH_LONG).show();
                    }
                }
            });


}

private void facebookLogin()
{

    mSignInPDialog = new ProgressDialog(LogInActivity.this);
    setupPDialog(mSignInPDialog,"Loading...","Getting data");
    LoginManager.getInstance().logInWithReadPermissions(LogInActivity.this, Arrays.asList("public_profile", "email", "user_birthday", "user_friends"));
    LoginManager.getInstance().registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            setLoggedIn("FacebookOnly");
            mSignInPDialog.dismiss();
            handleFacebookAccessToken(loginResult.getAccessToken());
        }

        @Override
        public void onCancel() {
            Toast.makeText(LogInActivity.this,"Log in was canceled!",Toast.LENGTH_SHORT).show();
            mSignInPDialog.dismiss();
        }

        @Override
        public void onError(FacebookException error) {
            Toast.makeText(LogInActivity.this,"Error" + error.getMessage(),Toast.LENGTH_SHORT).show();
            mSignInPDialog.dismiss();
        }
    });
}

  private void handleFacebookAccessToken(AccessToken token) {
    mSignInFPDialog = new ProgressDialog(LogInActivity.this);
    setupPDialog(mSignInFPDialog,"Loading...","Logging in");
    AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
    mFirebaseAuth.signInWithCredential(credential)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        FirebaseUser user = mFirebaseAuth.getCurrentUser();
                        setLoggedIn("True");
                        mSignInFPDialog.dismiss();
                        startActivity(new Intent(LogInActivity.this, MainActivity.class));
                        Toast.makeText(LogInActivity.this, "Logged in succesfully!", Toast.LENGTH_SHORT).show();
                        finish();
                    } else {
                        FirebaseException e = (FirebaseException) task.getException();
                        LoginManager.getInstance().logOut();
                        mSignInFPDialog.dismiss();
                        Toast.makeText(LogInActivity.this, "LogIn failed: " + e.getMessage(), Toast.LENGTH_LONG).show();
                    }
                }
            });
}

public void disconnectFromFacebook() {

    if (AccessToken.getCurrentAccessToken() == null) {
        Toast.makeText(MainActivity.this,"asdasdasd",Toast.LENGTH_SHORT).show();
        return;
    }
    firebaseAuth.signOut();
    new GraphRequest(AccessToken.getCurrentAccessToken(), "/me/permissions/", null, HttpMethod.DELETE, new GraphRequest
            .Callback() {
        @Override
        public void onCompleted(GraphResponse graphResponse) {

            LoginManager.getInstance().logOut();

        }
    }).executeAsync();
}