Location based sttore access

Hi. I want to let the users to my wcfm/wordpress site to always enter their location before accessing the website so that they can only see the stores/vendors around them. And make it a compulsory for the user to enter the location. Then also integrate this with wcfm. Then also I want the website to only display the stores around them only. I have tried geo my wp but it is not working. kindly any views on how to do this? Thanks
kindly.

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