The mobile App has been designed by myself (easy to manipulate). However, the website was designed by an outsourced developer (Joomla) and he is not available anymore. What I need to add is link the website to the mobile App such that the user can navigate to the website from the mobile App (and not the opposite) without being prompted to insert username and password again.
Both App and website linked to different DB's, however, they have identical usernames and passwords for each user. I can store the credentials in local variable storage and pass them to the website to validate them and then (somehow at the backend) allow the user to navigate directly to his home page in the website without going through login page. What I understand is that the website using the default Joomla login. But since I'm totally new to Joomla, I do not know where to start and where login process actually happens and if it is possible to amend it.
The system security requirement is very low and I'm free to bypass any complications as long as the user can see his profile in the website and not someone else's profile.
I checked the following threads:
Facebook Login - Tell joomla to login
What is the URL for user login (aka How to hide the login form?)
Logging in user without getting password from them
Single Sign On (SSO) Joomla with other System
And the first, is this possible using the default joomla login or you recommend using other plugins that are easier (specially for beginner Joomla user).
In case default login is recommended, what is the logic of using it? (how to send the credentials to joomla, and how joomla is going to receive them and navigate the user directly to the home page)
In case default login is not recommended, what plugins you recommend to use that require minimum manipulation (I'm very beginner in Joomla) and what is the logic should be followed?
Notice the username and the password are NOT encrypted, and security is not important here.