Using this module, users can directly log in or register with their LinkedIn credentials at this HumHub installation. A new button "LinkedIn" will appear on the login page.
Please follow the to create the required OAuth client ID credentials.
Once you have the Client ID and Client Secret created there, the values must then be entered in the module configuration at: Administration -> Modules -> LinkedIn Auth -> Settings.
This page also displays the Authorized redirect URI, which must be inserted in LinkedIn in the corresponding field. If after this signing will not work check useV2 checkbox and try again.