Updating a profile page linked to a dataset automatically

I have a social bar that populates with page member’s first and last name. I have a profile page structured off of a dataset that includes various pieces of information. How can I get the profile page to automatically update based on the member’s name that is reflected in the social bar. There doesn’t seem to be any clear and simple instructions on that.

Note, I’m not trying to create a separate log in page. I am using the member’s only access feature in Wix that requires a username and password set up by the member when they request access to the page.

In excel terms, I basically want the page to do this…"if the social bar says “Welcome Sherida Barnes”, then populate my profile page attached to a data set with her information.

Can anyone help? Again, I don’t want to build a separate log in page.

So basically you are using the Wix Members app and its features.
https://support.wix.com/en/site-members/setting-up-a-members-area

Also, when you talk about the social bar, I presume that you are talking about the login bar shown here in this section.
https://support.wix.com/en/article/editing-your-member-login-bar-settings

You already have a My Account page from within the Wix Members app that users can use.
https://support.wix.com/en/article/adding-a-members-area-to-your-site

However, if you are wanting to do a more detailed profile page which is a dynamic page and unique to each site member, then you would need to look at doing something like in this tutorial here through code.
https://support.wix.com/en/article/corvid-tutorial-building-your-own-members-area

Finally, to call info from the Wix Members PrivateMembersData collection, then you need to have a read of this page here.
https://support.wix.com/en/article/corvid-wix-members-privatemembersdata-collection-fields