Multi login in codeignter

do you have any experience about this issue includebeer ? the link you have given to me is it avaiable for codeignter 3 ?

i have been testing your link above but i don't ghet the point how to register users and get in the login   

Like mwhitney explained, you have to link all the login method to one user database. That way, the users can use any method available to log in. Install A3M on a test site, you will see in your profile page a way to link your facebook or twitter account to the same user. Then you can use one way or the other to login and you won't have duplicate user.

And yes it's available for CI3, just change the  branch for ci3-beta : https://github.com/donjakobo/A3M/tree/ci3-beta

yes i do design my database like mwhtiney said above then i have download and test it in my localhost but the first time i register my self then change the status from database and log in to system but there is no menu to make my account register to facebook or twitter, only has menu for profile, change the password and connect link to the account (not found i don't know why because i just fixed my htacsess to make it running). Connect link to the account is it for connect my account to media social ?

all i do in my htacsess from the oribinal file just remove this line RewriteBase / if not remove it it give me redirect to http://localhost/xampp/splash.php i use windows

Code:

RewriteEngine On
#RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^$ /index.php [L]
RewriteCond $1 !^(index\.php|resource|system|user_guide_src|bootstrap|robots\.txt|favicon\.ico)
RewriteRule ^(.*)$ index.php?/$1 [L,QSA]

my question 

1. what should i change in htacsess to make my projects become running well
   
2. after running well is it need to hosting to testing ?
   

sorry to much asking here but it give me errors, thanks for your comment includebeer