Login to Pinterest Business Account.
Once signed in, you will see your businessโ logo (if you have set up your profile) at the top right hand corner- click the arrow to the right of that.

Once you click the arrow you will see the menu below, and under the โYour Accountsโ section โ Click on โBusiness Accessโ

Once on the screen below, you will see a menu on the left side, and under โMembersโ click on โPartnersโ

Once you are in the โPartnersโ page, click on โInvite Partnerโ

This will open a pop-up window that allows you to enter a Business ID of who you want to invite, if you are adding Vigilante Marketing use Business ID: 50947176943063394 and the โInvite this partner to access your ad accounts and toolsโ setting.

Click โAdd Partnerโ
On the left side, select the businessโs profile whose access you want to give to the partner. You can choose to assign the Publisher permission now or at a later date.
On the right side, check the โPublisherโ box and click the โAssign permissionsโ button.