Access to CB from external site

Hi

I would like to know how can I enter in CB profile page from an external site, using the password and username given in the external site.

I have a site A with its own domain (a.com for example) that has an own code program, and a site B (with its own domain b.com for example) with CB installed.

I would like that an user can insert his username and password in the site A and access directly to his profile in site B
I have seen that this is possible to be done integrating part of CB Login in one site, but it is not clear for me and I didn't get it working

thanks in advance

You need a Joomla authenticate plugin that integrates with your other site. Next you need to set CBs login method to use authenticate plugins within CB > Configuration > General. If both sites are Joomla sites that run CB then you could use CB Auto Actions to push data from 1 site to another.