Step 1: Go to Your GTM Account

Navigate to your GTM account and click on the container name that you wish to grant access.

Step 2: Go to Admin Page

On the top-left side of your screen, select Admin.

Step 3: Click on User Management

Once you are on the Admin page, in the Account column, select User Management.

Step 4: Add a New User

From the top-right corner of your screen, click on the "+" sign and select Add Users.

Step 5: Enter the Email Address

Enter one or more email addresses to send an invite and click on the container you want to give access to under Container Permissions.

Step 6: Edit the Permissions and Finalize the Invite

A side panel will open and here you need to select the Publish permission. When you click on Done, the side panel will disappear. Finally, click on Invite.