Gitlab API command to return project users mapped to a project?

I am trying to get project members of a project using this command
the above command only returns only some users of the total users I see in members tab of the project.

And when I use this command below, I get all the users of a particular project that is shown in the website but access level is not returned.

I need employee id, name, email and specific access level of that user to migrate the project. Which API should I use in the above two? Is there any other api command to fetch user data mapped to a project along with name, id, email and access level?