To access Dataverse resources and data, users must first be created in Dataverse. There are 3 ways that an Office 365 Power Platform licensed user is added into Dataverse.
Resources
1. Manage application users in the Power Platform admin center – Power Platform | Microsoft Docs – https://docs.microsoft.com/power-platform/admin/manage-application-users
2. Security roles and privileges – Power Platform | Microsoft Docs https://docs.microsoft.com/power-platform/admin/security-roles-privileges
3. Create users and assign security roles – Power Platform | Microsoft Docs https://docs.microsoft.com/power-platform/admin/create-users-assign-online-security-roles#assign-a-security-role-to-a-user
4. Dataverse teams management – Power Platform | Microsoft Docs https://docs.microsoft.com/en-us/power-platform/admin/manage-teams#about-group-teams